Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd0ff39f01d07ba…

MALICIOUS

PDF

71.8 KB Created: 2021-01-25 12:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c661abf528c1d3f8d31e3b11a5531148 SHA-1: 77f6bb4944c1ca5feb9265a0254ba7bb2082583b SHA-256: acd0ff39f01d07ba6f751ba781fe9c4837ecdac1dd9e818314ac116daed5c50a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The presence of 'utm_term=tucson+az+craigslist+missed+connections' in one URL suggests a potential lure for users searching for specific content. No scripts were extracted, but the overall structure and numerous external links point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=tucson+az+craigslist+missed+connections PDF link annotation
    • https://buwofapakudo.weebly.com/uploads/1/3/5/3/135316190/1869086.pdfIn PDF document text
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/c8e05fc272.pdfIn PDF document text
    • https://cdn.sqhk.co/rawegili/9gfjhii/kitchen_master_cooking_mania_mod_apk.pdfIn PDF document text
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/kamenufu.pdfIn PDF document text
    • https://ligapixoxos.weebly.com/uploads/1/3/4/3/134378271/nepos.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/7eb90441ca6e11.pdfIn PDF document text
    • https://pibiwija.weebly.com/uploads/1/3/4/8/134896476/1cd3238f98.pdfIn PDF document text
    • http://lagujegivupani.22web.org/fonejigijivewe.pdfIn PDF document text
    • https://kezorida.weebly.com/uploads/1/3/5/3/135330530/mixoziwu-xoxamaniritol.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/70145b6bc560ec.pdfIn PDF document text
    • https://sovufejado.weebly.com/uploads/1/3/0/7/130740048/b4a2d32e.pdfIn PDF document text
    • https://tiwudusakuwizir.weebly.com/uploads/1/3/1/6/131637104/topivet-desewepasopasow-zilubomedufivow-monexojelalunis.pdfIn PDF document text
    • https://wuzusujozibavil.weebly.com/uploads/1/3/4/6/134689519/510501.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/divakemum.pdfIn PDF document text
    • https://wimaxexuxiwob.weebly.com/uploads/1/3/0/8/130874544/zilimibemigivulika.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/jb59igp/lebek.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/d73b3210ced1e8.pdfIn PDF document text
    • https://razesune.weebly.com/uploads/1/3/3/9/133986972/luladoke_webunudejol_nikumulu.pdfIn PDF document text
    • https://xebutalumibafa.weebly.com/uploads/1/3/1/0/131070398/e56d0ba6b1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sabukizazuse.epizy.com/wow_long_forgotten_hippogryph_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB5 5140 bytes
SHA-256: 31baaf80c9ceb80e35f745abb0082ef03beac8baedfc799ed5ccdb3434a4928e
font_01_sfnt_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 10472 bytes
SHA-256: a12018e5c7de4784a1c39869eff358a4b638faf7444ac7c91f5f2f9dd569a100
font_02_sfnt_off000103a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3