Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2651ec3faa3ff2…

MALICIOUS

PDF

101.7 KB Created: 2020-12-22 21:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 97a5dd58220ceb4291fb6a8145bc935e SHA-1: 3d9f2b003698b3f480b14b5729fd8d248214364a SHA-256: 2d2651ec3faa3ff256dee9e8384bd649ea2cb5c78c921509636bfaa81c4fcfc7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of the primary external URIs points to 'trafffe.ru', which is highly suspicious. ClamAV also detected this as Pdf.Phishing.Trojan. The presence of numerous links suggests an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafffe.ru/strik?utm_term=racer+off+road+vehicles+atv PDF link annotation
    • https://jabanomazekapuf.weebly.com/uploads/1/3/4/7/134743752/1575250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5f934a9223515.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://static1.squarespace.com/static/5fc5b7a7c14dfd36fe127655/t/5fc7245d0791337046ded88b/1606886498425/wupinazenon.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/hey_whipple_squeeze_this_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6c3e70-4026-434d-93bd-b3a8dd5db831/ejercicios_de_algoritmos_resueltos_en_matlab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc3bf7af81c9a2a0c1455cc/1606664060140/72790862127.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/zombieland_double_tap_google_docs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/texisejevaxevipewogaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aedf48f-d1fd-4cb8-a64e-711d557ad5db/37037863170.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/answering_machine_app_iphone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d72b0d716e027b00323d/t/5fcc78223ff1011540ea180a/1607235619700/taxi_sim_2020_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8e25ed-95bf-484e-b17a-520863f1487c/vampires_vs_the_bronx_ost.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe13a16c0a0fa116c3c3573/t/5fe1c1864ce6c363911e6f6b/1608630663287/love_album_video_songs_malayalam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d700ea4a794d5651c29e/t/5fccc01a33187724c4eeca99/1607254044161/bamuzigiworogeposikowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90532380-c260-4c13-9287-d7abede41eb0/45447906336.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_off0001428c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1428C 4860 bytes
SHA-256: 2907b466f5a468e5711d91d45bb433ba7208349ef87157a8a926b6a538fc9667
font_01_sfnt_off0001532a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1532A 11936 bytes
SHA-256: b1f36883c5f1053b96ff9dfc8659dace59f0315bbf2226f7324c75b9c3441620
font_02_sfnt_off00017ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BA2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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