Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d5014b21d857f1…

MALICIOUS

PDF

77.1 KB Created: 2021-06-01 16:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ed69af8d9f046fd7cd398d9fc60300c7 SHA-1: 6a7d19899a88901f52a841254f007b2e7b195122 SHA-256: 07d5014b21d857f116db8df41b782fe928e0e37d8b6ff16340bd6c180fe0c005
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that likely lead to phishing sites or malware downloads. The presence of multiple external links and the use of disposable hosting suggest a tactic to distribute malicious content broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/pbw?utm_term=sumas+y+restas+con+llevadas+tercero+de+primaria PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393901/normal_5fee69cf4ac2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485163/normal_5ffb1505ecc5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454677/normal_606ddc9fdd545.pdfIn PDF document text
    • https://tojumemi.weebly.com/uploads/1/3/1/3/131379390/3313118.pdfIn PDF document text
    • https://bexejasofipa.weebly.com/uploads/1/3/1/3/131397997/xijaradibubi.pdfIn PDF document text
    • https://vusiwofadenu.weebly.com/uploads/1/3/4/2/134265349/nujedugefimofew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_6017cf2544447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_606081dc9eb2c.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/bulomegifagazadoxet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_5fd77711cfb78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450864/normal_5fed472edfb08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_600bfe896b64d.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://uploads.strikinglycdn.com/files/88dc8fa8-af21-4ceb-b3a1-c73bb1330e60/59230417547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11c2889-2c69-4fb0-a162-2702d155522f/bob_the_robber_4_unblocked_games_66.pdfIn PDF document text
    • http://nefusim.pbworks.com/f/12822563505.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144421224/magimediwewexomorofitanuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd412b2-2375-4422-9694-3c6528d385ce/best_online_spoken_english_classes_in_tamilnadu.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/justinas_marcinkeviius_mindaugas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5864420-baee-4316-8e03-71f181157176/list_heteronyms_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e48cdddf-b645-4fe8-b62b-8cf62f19c8b2/libro_el_rinoceronte_resumen_por_capitulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c6add3-1e3b-4d37-8b0b-0f8d5d43348d/st_louis_de_montfort_oak_lawn_il_mass_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84093b8-59c8-4c9c-8b4f-79f81dd63639/jurug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230979bf-bf9d-427e-a6ab-e43899fa8e14/16303493502.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_off0000ddd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD3 5364 bytes
SHA-256: edfad577da51eebb355e9e41b1f3291a26113425a0e399f8bedb84564a29f293
font_01_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 12232 bytes
SHA-256: 5684c4924a6ef00a8aa47a0c3bd0c972e41dfa85e70232158e90864fa0f5952d
font_02_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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