Malicious PDF — malware analysis report

Static analysis result for SHA-256 7784d8da03f6a415…

MALICIOUS

PDF

81.6 KB Created: 2021-04-28 08:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 60da1649d036c7efcefc9aa67e973e03 SHA-1: 7920ccc104d8ca23d7dfcd1bd431df7b9c06b696 SHA-256: 7784d8da03f6a415b742d6e9a0344a2add3f77995b6d65d87cd4ab7a80488b91
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=fujifilm+xp70+app+download PDF link annotation
    • http://gavediteriremuv.medianewsonline.com/wuzizepemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_605b89369e356.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/fitbit_flex_3_straps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_6043de55d1245.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/eCqhjhc/nearest_halloween_costume_store_near_me.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/cards_against_humanity_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375361/normal_6008cd5e9be53.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/somefotexaludop.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/fiijiha/beholder_5e_cr.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/1962_roman_breviary_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_56da40ae836d47c99dcde4a168cb98d6.pdf?index=trueIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_53077530b4284cb6a65f3903f7d71677.pdf?index=trueIn PDF document text
    • http://nokejufesuw.atwebpages.com/business_productivity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e51dfc-bd26-420d-88c2-202427352cd3/rejuweri.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/my_anti_fan_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249324aa-d523-4564-a578-5af9cbb15f9e/english_101_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce5d455-7fa8-4453-ae06-7499fcead327/telamuwijeximesenev.pdfIn PDF document text
    • http://jopubijako.atwebpages.com/bijevesarojarudedi.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_cda8d63d1f4543ff8161e32280c50a54.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_d48c1c54783b437895686bc07684ef6a.pdf?index=trueIn PDF document text
    • https://0c1adbbe-b65a-4c28-9da2-87cea21e0636.filesusr.com/ugd/496951_9011f862c109426ab8296f1ba12e2793.pdf?index=trueIn 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_off0000ffa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA8 5324 bytes
SHA-256: 4b3f5c7a0291a6e6da17e65f37a66f449146a6323f1746d435508ffa9751e9fa
font_01_sfnt_off000111de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DE 11024 bytes
SHA-256: 7eb0e77bf7792f80260e5d1abc76cf01a8edb565ddd404c962d7e25683e7f969

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