Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c6502ab0c0f59b…

MALICIOUS

PDF

81.3 KB Created: 2021-04-20 19:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6bc55e00f01dac7548a9db13e4bc2fce SHA-1: 22891f959ea7529ed907183f565e3a61fc3a606d SHA-256: 69c6502ab0c0f59b80ae72b8493da191997fb3cb1eeab7725299d0b2043820ec
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'fixing a wine cooler'. The presence of a link farm and a critical ClamAV detection further support a malicious classification. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+do+i+fix+my+wine+cooler In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_601781cb093ce.pdfIn PDF document text
    • http://vuwadezizubem.22web.org/ihss_riverside_county_timesheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_6000189c580e0.pdfIn PDF document text
    • http://rusidaf.22web.org/12896988897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_6017beac53fa7.pdfIn PDF document text
    • http://doxugivo.22web.org/vizuleponeviguvo.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
    • https://s3.amazonaws.com/zowejunef/nexasivaregasafasureguj.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_b9970d0154bc420b93f4f03875f6d79f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xesigeze/86870346328.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_33c9059e004f4c00a1cac31f8a2d365a.pdf?index=trueIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_0d3c87ced6504187b7bc4e7037e00b8d.pdf?index=trueIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_e0b3f60fcb734197b7787353c5e83001.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bodajaku/99221963399.pdfIn PDF document text
    • http://fudewisukot.rf.gd/loluretiliverorekoni.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_66025ad1ae53462b9471c828991e6651.pdf?index=trueIn PDF document text
    • http://lizelonuzabixek.epizy.com/bilakodobuxafegopigoku.pdfIn PDF document text
    • http://buvodadixasiz.epizy.com/5e_fighter_warlock_guide.pdfIn PDF document text
    • http://fidotetunuxezi.epizy.com/avraham_ben_moshe_videos.pdfIn PDF document text
    • https://d787a32c-196b-4e99-9c98-3ae3c28023f9.filesusr.com/ugd/05b469_88a6d29c1c7541089f77274248419d9f.pdf?index=trueIn PDF document text
    • http://mopuriruwinufi.epizy.com/aseptic_technique_pharmacy.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_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 4712 bytes
SHA-256: e177d1116a0ab39e2ad178ec93e7c4de7abf2acb9634af870895902d50323d79
font_01_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 11760 bytes
SHA-256: 6d263e23a27da3fec850e117e80e58fd763e805fc1e965cacbf8faf7cb1f5cdc
font_02_sfnt_off000129f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3