Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ea058fca3d42ac…

MALICIOUS

PDF

78.4 KB Created: 2021-02-17 01:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7846b7575a0e881ad5c0333cd3915c8b SHA-1: 80c339ad0fc9d1b8fbf63bc3806bf026d15443ea SHA-256: 39ea058fca3d42ac7c48d8190cdca0227e18a8590f2eb14498243c86385cfab6
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL related to 'Bank of America Merrill Lynch' indicates a phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://maypoin.ru/strik?utm_term=bank+of+america+merrill+lynch+corporate+card PDF link annotation
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/9617592.pdfIn PDF document text
    • https://lemuvizavo.weebly.com/uploads/1/3/2/6/132682731/ff5070b.pdfIn PDF document text
    • https://fasukawoj.weebly.com/uploads/1/3/1/4/131453618/timigan.pdfIn PDF document text
    • https://genofegewad.weebly.com/uploads/1/3/0/7/130776157/lenawofagadil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_601e93a66c31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_60179b5c4d5fa.pdfIn PDF document text
    • https://pupuzufasu.weebly.com/uploads/1/3/4/7/134759867/defa9257.pdfIn PDF document text
    • http://nudukuju.22web.org/id_card_template_word_landscape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502819/normal_5fe8bddb25f2b.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/84a82843.pdfIn PDF document text
    • https://jajufuwupu.weebly.com/uploads/1/3/1/1/131163717/kowufojo.pdfIn PDF document text
    • https://gafewabonir.weebly.com/uploads/1/3/2/6/132696171/a9ee91.pdfIn PDF document text
    • http://greyfruit.space/cfpb_reportable_hmda_data_2018ad8ei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_60054da6d1d14.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
    • http://refusenub.rf.gd/fomafujowodevumirorov.pdfIn PDF document text
    • http://vixezazemezox.epizy.com/aashiqui_2_tamil_song_video.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_off0000e43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43F 5220 bytes
SHA-256: 652ceca4ac92d3d8d7da65c9201aea0e6af6c412947d6a7a33cbabf4477f89f8
font_01_sfnt_off0000f5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 11728 bytes
SHA-256: bb4e962da27dc6de4daa2571b74d2aef2ddbb149ab8680e3d023d8717d563fd6
font_02_sfnt_off00011df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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