Malicious PDF — malware analysis report

Static analysis result for SHA-256 568396b18860fb13…

MALICIOUS

PDF

98.1 KB Created: 2021-04-08 17:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 566e1ffc6f688080535335e2ef4f6b26 SHA-1: e7ce5c0f8ee24738b19e21f49e34e8e5895af07e SHA-256: 568396b18860fb13af0fd2ae24f5774de25ff1a9daf3caed1c8f27fa1ce66363
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=how+to+cite+charles+darwin+origin+of+species PDF link annotation
    • https://bobefenore.weebly.com/uploads/1/3/4/0/134016691/32df06a3.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/al_anon_12_steps_and_12_traditions_book.pdfIn PDF document text
    • https://joluxowupowuxi.weebly.com/uploads/1/3/4/4/134478900/75df34c.pdfIn PDF document text
    • https://dosogomufafana.weebly.com/uploads/1/3/2/6/132696174/5ed7055b55.pdfIn PDF document text
    • https://wujadadi.weebly.com/uploads/1/3/1/0/131070572/duduba.pdfIn PDF document text
    • https://pasifoberili.weebly.com/uploads/1/3/4/8/134881239/menewijisizel_fesetunedez_vigosos_nisibesenudi.pdfIn PDF document text
    • https://dosodufixelo.weebly.com/uploads/1/3/2/6/132682620/f2ecc2baca58b12.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/18640470983.pdfIn PDF document text
    • http://gopudumimipabol.mypressonline.com/kotelokopuruj.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/3b06b51c-2705-47ab-9c04-6f67f205002f/98757305968.pdfIn PDF document text
    • http://gapifemesi.rf.gd/bankersadda_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4136356-28e2-4429-b024-3fe17950680b/47620706556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74e86db-5b89-46b3-aea3-e97d78f80477/best_investment_for_2021_philippines.pdfIn PDF document text
    • http://kimabajakagun.epizy.com/91587129176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7985d452-faab-4db7-9088-a9fe7752a293/does_wendys_frosty_have_dairy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5fd748c-17be-4ebd-b19b-aaf7b119dcf9/how_many_miles_can_a_honda_odyssey_last.pdfIn PDF document text
    • http://tenubitifane.rf.gd/91483310469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c10a1b4-4064-4d2d-899f-e60526fc2db9/vevajamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318f1360-9e13-4e9b-bff8-9ede9b4c0a05/graco_pack_n_play_quick_connect_mattress_size.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 18796 bytes
SHA-256: e5b67a9a539b2727a1e5bdac6cbbc03a1f65afe86c18cef2f5f5568f310c5f47
font_01_sfnt_off000125e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E0 5256 bytes
SHA-256: 3107a474f654fcf9b7d91cd821d3406b367869e6ff571fc6d39736eb0a5cfb9f
font_02_sfnt_off000137b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B6 2920 bytes
SHA-256: a826cd15759f1829322e48458c95f716dcebf2f8ccfe96592ead52aedcdb4a70
font_03_sfnt_off0001434d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434D 11332 bytes
SHA-256: 60327a713db6860c852c78ddf9fb18c40bbcd6a17cc84f729b3103828ef706f9
font_04_sfnt_off000169c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169C1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34