Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30a673c4e7c06e5…

MALICIOUS

PDF

89.6 KB Created: 2021-03-25 17:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4487fed2935db251f733b5eb790a1676 SHA-1: f744211f26f2e994cd292b2c5e7d7ff235af5e31 SHA-256: f30a673c4e7c06e579ea5bbd2d258b1e99530a824db21ba63c796671d83073b0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary URL, 'https://baarspo.ru/award?keyword=carl+s+jr+employment+application+pdf', indicates a phishing lure related to employment. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/award?keyword=carl+s+jr+employment+application+pdf PDF link annotation
    • https://fejalunaruxepiv.weebly.com/uploads/1/3/4/4/134489653/nuderudi_joxinunezej_duxaroxiw.pdfIn PDF document text
    • https://kepubaxolawava.weebly.com/uploads/1/3/4/7/134703856/8082591.pdfIn PDF document text
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/geriradubegirumewu.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/molaru.pdfIn PDF document text
    • https://dekizojumuleje.weebly.com/uploads/1/3/4/1/134133140/rurusamezal-fafemeliraduva-rakibumijizu.pdfIn PDF document text
    • http://mexuloxuxinona.iblogger.org/candy_crush_game_for_mobile_apk.pdfIn PDF document text
    • http://suxinojopamur.iblogger.org/wepevubakab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a9b7993f-6967-48c1-a2c3-d5bc86fe985f.filesusr.com/ugd/ea2be3_6ba4debbb70b4309b1136e91771519a6.pdf?index=trueIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_3da2e2b003c44a1f83addb252af78c89.pdf?index=trueIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_f9828d80a6c3495c94c10314c11281d8.pdf?index=trueIn PDF document text
    • http://wuzuruwevirelu.rf.gd/lepidobuvupaxulabepode.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_2872d339a8d54bd9904ac0b86b34bbb4.pdf?index=trueIn PDF document text
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_5c95ef02ebcc45888d8db3b922320115.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5b0666-907e-488c-afe5-a8b1cb638a50/porter_cable_fn250b_piston_stop_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d42309-224a-40d9-b8f3-84357af72811/john_deere_js40_carb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d742b729-116c-43e2-9065-93aefbb55b1f/what_does_222_mean_in_islam.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_d502eb1c1ea84e97acf9b8a2e0f03142.pdf?index=trueIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_1d32cebfa610414da4939ec48d415f93.pdf?index=trueIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_b1b3988282594160b19cf6dd845f4455.pdf?index=trueIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_21b36d9e0fee4175b1bf58247e4b179f.pdf?index=trueIn PDF document text
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_0aac0a1a30b64039bb44159bc3557957.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_a433b45a2fe140ccb5babf4dcbae89cf.pdf?index=trueIn PDF document text
    • http://tikixowogozomi.epizy.com/oxford_dictionary_free_download_english_to_english.pdfIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_b8f0290843fa40d7907c5f9fac5e46c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b03a23c-4a0b-44a1-8c35-057da8ec31ed/what_language_did_mary_queen_of_scots_speak.pdfIn PDF document text
    • http://tixololug.epizy.com/innova_3100j_live_data.pdfIn PDF document text
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_713bc04812fe40f5b5a954507f81c728.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_642117331d124f749001a0d7af6461b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9416fe0-6f48-4046-9a6a-6f324621e325/87039141194.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11108 5288 bytes
SHA-256: c172e3aab2523d5f0bfb733339c68762bd205a33ccdbed077b8ca797dcad7b82
font_01_sfnt_off000122fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FC 11612 bytes
SHA-256: d981d7f00ede62eae3690f9e7acd4694f653911a890e88d8b854f36a476fc2ff
font_02_sfnt_off00014a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A80 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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