Malicious PDF — malware analysis report

Static analysis result for SHA-256 623171759312cf13…

MALICIOUS

PDF

91.9 KB Created: 2021-04-25 00:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8d0892a3c5923ac682f48172312ce7d3 SHA-1: 56ef817229b26a9e3634aab91696be1c44c0b9be SHA-256: 623171759312cf132bb477cccd544c6f3e631e8e30c6c245c45caf42d6dcac4f
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 0.9992

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://dafemum.ru/strik?utm_term=example+of+essay+writing+about+covid+19 PDF link annotation
    • https://zejenabo.weebly.com/uploads/1/3/0/9/130969472/nutonibij_lidon_vewixogumemuval_nolitumeto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5fc98c7e84f91.pdfIn PDF document text
    • https://sefusozikoju.weebly.com/uploads/1/3/4/3/134366316/nomepef.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/21633239123.pdfIn PDF document text
    • https://cdn.sqhk.co/koporikog/5wligcr/18752531368.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/hdiejcK/vufofibiluxuluxutepa.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/gdtAgbC/14672396171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367640/normal_5ff0cf357b64f.pdfIn PDF document text
    • https://xovadesunuzavam.weebly.com/uploads/1/3/4/4/134479636/7956fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fec69c4b14d8.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/jiziwuwabumeral.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/basic_acoustic_guitar_chords_chart.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/63fc982447130.pdfIn PDF document text
    • https://mixodozom.weebly.com/uploads/1/3/4/3/134333910/6841369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_606b977679669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5ff4429d5d006.pdfIn PDF document text
    • https://rofewonopanofav.weebly.com/uploads/1/3/5/3/135312507/82f27278d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_5fd12dfe65574.pdfIn PDF document text
    • https://cdn.sqhk.co/forexajepusa/idgfGfL/hattrick_imran_khan_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_600fa6f7b3b0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455901/normal_60657bcd91d11.pdfIn PDF document text
    • https://xomupufemi.weebly.com/uploads/1/3/4/3/134322732/f44ad8bcc82dba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/15068644052.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/renuvumujutexovav.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_off00012606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12606 6100 bytes
SHA-256: 6a60f4c0a3990d56536179504f803e75f7ce4b6c8ff2d9c80d33fb95207a8dfc
font_01_sfnt_off00013ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADA 11124 bytes
SHA-256: 05ce3657ea694a5dda91d37facb8a60841eb8d062fb4682e1ec8597f5a676ef3

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