Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b97932d38875a1…

MALICIOUS

PDF

74.0 KB Created: 2021-03-04 19:23:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6f0dcaa209f81194ff7f541072407182 SHA-1: bfa48cd2175401f0de868a1fac5668fb45a5c718 SHA-256: 60b97932d38875a1ecabf22828e2f67f2d7dbcf16197333db3bd97ffbab908d3
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. The primary URL, https://mezovuduw.ru/award?keyword=longman+dictionary+download+for+mac, suggests a phishing or scam attempt by impersonating a search result for a dictionary download. The document body, though heavily obfuscated, contains references to the search term, reinforcing the lure.

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 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://mezovuduw.ru/award?keyword=longman+dictionary+download+for+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451049/normal_6026fd6151fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_601de57e36185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_60312e7eb52f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530171/normal_5fd8d12d1e92f.pdfIn PDF document text
    • http://fusagawi.iblogger.org/15377753177.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fee94635e7b0.pdfIn PDF document text
    • http://loxapul.iblogger.org/bimifa.pdfIn PDF document text
    • http://wexebigusokata.iblogger.org/33019375715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_600e47bf59a5a.pdfIn PDF document text
    • http://5coupon.info/how_to_conduct_a_post_implementation_reviewgt0ys.pdfIn PDF document text
    • http://edarudost.online/26629357857fqf5g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5fd9f517f1306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/lazy_boy_electric_recliner_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/2018_punjabi_films.pdfIn PDF document text
    • http://renawexit.epizy.com/samsung_wf220anw_xaa_manual.pdfIn PDF document text
    • http://wasaxeradiko.rf.gd/70794923251.pdfIn PDF document text
    • http://tuxusar.epizy.com/bofusagomazafagiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/botanical_line_drawing_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/zerokovegupurajukod.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 5300 bytes
SHA-256: 51fa46d69a53a9f5a0a23ff4df233732364b0c7a29879aa69080f62525e7744e
font_01_sfnt_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 10344 bytes
SHA-256: 4553adc023eac4c809ec954d2f32ee6c44167fa2b090523f28895b36b61930b9

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