Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7c2ac2cd895643…

MALICIOUS

PDF

81.1 KB Created: 2021-02-28 12:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cfa721df5bb6e867da4d0805d9f9d588 SHA-1: a363a222acf53b1bf1f6488850a817f615d71d0e SHA-256: 6e7c2ac2cd89564356aad5b7df84697902412ef4e56398116e77a34726593d0b
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into visiting them under the guise of a safety guide.

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://soxebez.ru/wix?keyword=walmart+safety+1st+guide+65+sport PDF link annotation
    • https://keninowe.weebly.com/uploads/1/3/4/6/134617270/e04c4e661e.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/fufumuxadisatuj.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/what_is_the_main_cause_of_gang_violence.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/bV890Mt/cnc_machine_wood_and_metal.pdfIn PDF document text
    • https://xepesirivow.weebly.com/uploads/1/3/1/4/131408502/635247.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/fogavibiwikudazofoguvok.pdfIn PDF document text
    • https://dozajumeguru.weebly.com/uploads/1/3/1/3/131379069/1381488.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/jjggQhe/alabama_football_apparel_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/ekhgieT/bezoguruxofemetowumemeg.pdfIn PDF document text
    • https://patobusogeziwe.weebly.com/uploads/1/3/4/0/134096506/183970.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/ibgcvsh/installer_rom_android_sans_root.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/gIWibNV/carpenters_wood_cutting_tool_crossword_clue.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/sazixipame/eclipse_software_java.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/psylocke_comic_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/29456420706.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_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 5804 bytes
SHA-256: 6d9d07b9488f056ad5ea0cc7f7efc9bccdc689b6a7c1686547099cdc823dd289
font_01_sfnt_off00011301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 10604 bytes
SHA-256: ee0b6d798e657d42292f59a07f827f75be9d8d62e656c9913794a110a1df706a

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