Malicious PDF — malware analysis report

Static analysis result for SHA-256 107b3e18f238d41b…

MALICIOUS

PDF

92.5 KB Created: 2021-03-15 12:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 31131a34bcec8807e339a0cddee8fa87 SHA-1: cfc1637cbca0a26093c14f697a81ff70957cadcc SHA-256: 107b3e18f238d41bac286384218371eaa12090081d0adb6d95327a7ca0298155
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The presence of a link farm on disposable hosting suggests an attempt to obscure the ultimate destination or distribute various lures. While no scripts were directly extracted, the PDF structure and URI patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/123?utm_term=beats+audio+software+pc PDF link annotation
    • http://punavuvipufov.sportsontheweb.net/bowosilexubejinajosir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412887/normal_5fcff56611a52.pdfIn PDF document text
    • https://wowevabesal.weebly.com/uploads/1/3/5/3/135322278/tavalagonoju.pdfIn PDF document text
    • http://zukasegepeni.22web.org/7936500980.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5fffeb2ecd39a.pdfIn PDF document text
    • https://widavobixi.weebly.com/uploads/1/3/4/4/134494271/xipolamem.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/pinasulineduvox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479674/normal_5ff9bce69e606.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/63313253747.pdfIn PDF document text
    • https://faraxebeg.weebly.com/uploads/1/3/4/4/134475962/3922276.pdfIn PDF document text
    • https://jamibada.weebly.com/uploads/1/3/1/1/131164428/manelefegufil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_603851826c2c7.pdfIn PDF document text
    • https://kowumawadixowiv.weebly.com/uploads/1/3/4/8/134888970/puwulawiluvotutip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_603d3805656f8.pdfIn PDF document text
    • https://garimawenipasad.weebly.com/uploads/1/3/4/5/134595154/7411491.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/atresia_esofagica_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://domozutelopo.rf.gd/how_to_use_a_foodsaver_fm3940.pdfIn PDF document text
    • http://lagamifex.epizy.com/98657027923.pdfIn PDF document text
    • http://wuxininozikup.rf.gd/rabisoju.pdfIn PDF document text
    • http://pevexuzuzuku.rf.gd/xusadutiledo.pdfIn PDF document text
    • http://rojapamun.epizy.com/80283914499.pdfIn PDF document text
    • http://perurafofasiw.epizy.com/admiral_2016_full_movie.pdfIn PDF document text
    • http://kimajuj.epizy.com/jafadofaxofejuguboli.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_off00012bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBD 5260 bytes
SHA-256: 40a617209f9f59ecc7e902066a68575f2400ea063dcfd7303f7a11af19d1bee9
font_01_sfnt_off00013dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC3 11484 bytes
SHA-256: e9baad1818ff2f68ca7ccbf0289a70aaf6939fe50a012a5b0abd4966bdeb1617

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