Malicious PDF — malware analysis report

Static analysis result for SHA-256 d751606bf2297ee6…

MALICIOUS

PDF

87.9 KB Created: 2021-03-20 05:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a41ed8515b22fef1a87bf269edf540b SHA-1: 994d623979386c99bd57ffed3588e47b05adbd25 SHA-256: d751606bf2297ee68c1d44d856696aeb8b67c1c63b0afc2c608cdc0b700180b1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=girl+with+the+pearl+earring+pdf
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/fotogik.pdf
    • https://dopakuxapat.weebly.com/uploads/1/3/4/8/134895633/jejoxegowefasafas.pdf
    • http://pewujok.mypressonline.com/fupolo.pdf
    • https://cdn.sqhk.co/xurilopotun/QnifnRv/zizinemiteg.pdf
    • http://luwinilulurop.mywebcommunity.org/isound_bluetooth_speaker.pdf
    • https://larezonisu.weebly.com/uploads/1/3/0/7/130738889/9774466.pdf
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/pinuraguduresi.pdf
    • https://cdn.sqhk.co/jotepomi/hi6igvh/football_champions_league_winners.pdf
    • https://cdn.sqhk.co/pabefidinaz/QM39Sic/jovumotezasot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_babbdcf7c7a149dcac00716a54034d14.pdf?index=true
    • http://geforagegi.atwebpages.com/webizozezo.pdf
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_f42d8bc8cf62406cb87566f2a2c45330.pdf?index=true
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_154b7498b51e40ccb375ca034f279c46.pdf?index=true
    • https://s3.amazonaws.com/sigobija/cheat_sheet_font_awesome_5.pdf
    • https://s3.amazonaws.com/lovomijelun/9557520222.pdf
    • https://s3.amazonaws.com/bubodeliza/bisivofidixulutikakewod.pdf
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_58fa6bf22c4548eeab6ee69610c5e964.pdf?index=true
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_c483a593734c49dcba6092925b775a99.pdf?index=true
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_4f048420936d4cab9cc70cc275575c46.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001165b.bin
82ad3f521544772593133d0daa5324d1fe92d2706bb9c4297ba79a63dd24341b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 5248 bytes
font_01_sfnt_off00012841.bin
e41ab89d7435d9359d0b442f411e162c70c294d757ccd9f029637a38dbca48f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 11996 bytes

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