Malicious PDF — malware analysis report

Static analysis result for SHA-256 028b358e7c64db23…

MALICIOUS

PDF

76.5 KB Created: 2021-03-20 06:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 577245dfde3076b99b44ce871bed3939 SHA-1: 39e7dc5f5eed8153e5701b850fedb10ad2492ad1 SHA-256: 028b358e7c64db23ef9762c40abf458cb6c9c9962357215fb610159e64a932d5
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 0.9999

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://baarspo.ru/award?keyword=a+night+to+remember+pdf+download PDF link annotation
    • http://topuniversityru.fun/what_does_every_reason_to_believe_meantx6q7.pdfIn PDF document text
    • http://skidki-day.shop/63696839174n2tw9.pdfIn PDF document text
    • http://kpupnov.pro/tojuturuvo7244f.pdfIn PDF document text
    • http://soldonlakewood.com/59809805303uzte8.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/254fe2eeb0ebba.pdfIn PDF document text
    • https://tuzenuzibawura.weebly.com/uploads/1/3/4/7/134733138/ba0cbbee.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/536021f6c643a68.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/kilapiloroga-natifipumok-xufupap-talunawixu.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/72646387222.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/vijadoxeda.pdfIn PDF document text
    • https://nogurutofuxuj.weebly.com/uploads/1/3/4/5/134525281/6831942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f33604d-5083-4fc9-a783-c1745bf5bd8e/lanazijudaroxamulopora.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/9330342981.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/calculator_casio_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec98e967-55d4-4bb3-9e15-57e0e5668525/navekele.pdfIn PDF document text
    • http://zakefuki.myartsonline.com/41185781866.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/ielts_general_reading_test_with_answers_2020.pdfIn PDF document text
    • http://fomepufasele.atwebpages.com/62588197677.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_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 5496 bytes
SHA-256: a7fe749be2868995118bb82d11b7c5b3caa9ffe1f560c32971b0b70b4cb068cc
font_01_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 15808 bytes
SHA-256: 68abd8b397cd24c8addf05e3026a9d7a1e6f21dbbfd9063d1ab0e1343f032df4

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