Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0aff19770f25650…

MALICIOUS

PDF

76.7 KB Created: 2021-05-16 18:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13b49d8061fe9c1ae9af5df72468d500 SHA-1: 899d926745cb7a1043ad98e66d8852d09ae99411 SHA-256: f0aff19770f25650829e5b7c2cf8719e012ee05562683090a7747a77c0d2525e
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 0.9998

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://midufefew.ru/strik?utm_term=can+i+air+fry+food+in+a+convection+oven PDF link annotation
    • http://bikizugupaka.iblogger.org/history_of_african_american_literature.pdfIn PDF document text
    • http://podeves.xyz/joker_script_murray_show7tdig.pdfIn PDF document text
    • http://storefromit.pro/77270932234gd1b7.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/gczhH8n/hashtags_for_instagram_likes_and_comments.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/gHiikhc/vimazabozusalobomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatofemurilepa.rf.gd/orlando_virginia_woolf.pdfIn PDF document text
    • http://safodur.epizy.com/titogobopurikadapedikop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9f756d-f693-4dc2-a6ec-213958c211ae/18504813979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61be962-02ae-45d0-b5cb-a99d39362ea5/how_to_calculate_voltage_drop_in_parallel.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_a674e94fb7114927ac0c21608a34c512.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15dd1a6-d0c6-4f00-9670-8008d02ddc44/kafitapizad.pdfIn PDF document text
    • http://bexipazo.rf.gd/4390191286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18580947-88ec-45ef-943e-bbe5f8db226f/bosudavumavubazujezozurev.pdfIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_116e81f6c4114692b5e857f6363ce481.pdf?index=trueIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_b2ab7953b8194761b8fe40644f2c52f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7942c7f-899b-415e-98a7-54f499d6eb6b/avaya_1408_phone_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068d14ce-c8d0-4ca0-8f6f-8bfdaeff1609/sudusikisut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a16e8f1-11cc-4f59-9eda-3bb69ef4b904/remington_1187_tactical_parts.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 4872 bytes
SHA-256: 0d327998e90b0dc5fcac1f8f300c802f76c9e8f85f434cc2b90d4ba7ce7234ae
font_01_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 11708 bytes
SHA-256: 8a7c149fe873550547cdb17957c9afcac41352d32e4d35d6af638964be7a515f

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