Malicious PDF — malware analysis report

Static analysis result for SHA-256 df080a36cb75c14c…

MALICIOUS

PDF

84.5 KB Created: 2020-12-08 19:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7ca7d526671650379513cdc15b61007a SHA-1: beaf37fd8fe0681790f32c11a3701b2cd545caec SHA-256: df080a36cb75c14cbc15efedaf4a4deec6986e1bdaab3931bdd84c05cc93a0dc
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 0.9997

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://trafffi.ru/strik?utm_term=lewis+structure+for+so2+resonance PDF link annotation
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/kitobabozaser.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/bapamap.pdfIn PDF document text
    • https://bujugumaxu.weebly.com/uploads/1/3/4/0/134096797/fomurot-jorarokesamipo.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/wusetuxisuxidakuwavi.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/xokaxeramuse_nelenateze_fanozu_lubazitagabeku.pdfIn PDF document text
    • https://bomosaxume.weebly.com/uploads/1/3/4/8/134892214/devojawuf-sudedizezil-tuzotevof-tunalarodep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6751d27a199023adb75cf/t/5fc6b00b4e98326c02ff4a8c/1606856715546/75268058001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fedcea3d-cd3c-4a70-807e-7d24898fb623/97031945354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5761829-a9fd-49e9-9464-fc2839ca0da0/obabo_vs_amama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96afffb4-7b10-4f68-b228-54c920232935/45236913311.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5acadaffbf90a660b1fb2/t/5fce385a2fa8bc6bcd145e06/1607350367348/war_robot_apk_mod_money.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc383e42cf09257bd7c65aa/t/5fc443999d7936484015b8b0/1606697881951/wuwexawupifikapunewan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b63bab79f442f228a4c9/t/5fc15e209b1ed035380f1f22/1606508064396/air_wick_automatic_spray_refill.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 5008 bytes
SHA-256: 1e1cd2d8ab46361773d7db78950db5cb2b2730c9f3910ea03cbb42edf43c8cf6
font_01_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 12012 bytes
SHA-256: 232022e1de4507372268188eb451507244b685badbadbb711e0e024d95142294
font_02_sfnt_off00013005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13005 16064 bytes
SHA-256: 0143f1303204e677e4f5ca9ddc1e3137fc305ad20a48f3e13082630f190f0e83

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