Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a11e7ef24a08b0…

MALICIOUS

PDF

86.5 KB Created: 2021-01-14 11:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b35ced142657509e88a45a8370d8ebad SHA-1: 7b7790953374d25c7e00817f1a702636a28e18ab SHA-256: e7a11e7ef24a08b001764dd52ee28a68647f5190fa121bb2fc1e474cdbc43fdc
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The embedded content, though obfuscated, suggests an attempt to masquerade as a legitimate document to lure users to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/aws?utm_term=carestream+vue+pacs+user+manual PDF link annotation
    • https://kupefuvewugixo.weebly.com/uploads/1/3/4/8/134849821/961081.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/ijNBgf0/tunnel_of_winds_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/htO7iiX/e_coli_uti_contagious.pdfIn PDF document text
    • https://cdn.sqhk.co/lezenelu/ko5idOn/hitman_2_goty_upgrade_legacy_pack_steam_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fbdf24687b08.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/jbrqmj7/sky_events_calendar_2019.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://s3.amazonaws.com/nuxulikiwab/82815674349.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/acsm_flexibility_training_exercise_design_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/noxizokefepaxotadawetuzuj.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/93305845069.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/chandelier_cad_block_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/aladdin_2019_free_movies_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/59522280503.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_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 4884 bytes
SHA-256: fb323de83f5431e5342a69494249d3b8611e3a9503e1d64effb0b3f2205a491b
font_01_sfnt_off000118ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EF 11164 bytes
SHA-256: 594647fa7261db5307917fafdad444005a6924ee2a7c2eabba8aab6dedd284a1
font_02_sfnt_off00013ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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