Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacafb790bfaad35…

MALICIOUS

PDF

84.9 KB Created: 2021-03-03 22:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc1db236d3bb29553af959a1730d802a SHA-1: dc432c0c3be0490b9e65b740f1e9d3ce189fb219 SHA-256: eacafb790bfaad35b37ac34438c236cdb419982273ebeb5617eb9c60ef4ea488
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were extracted, the PDF structure and embedded links are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/strik?utm_term=sears+kenmore+elite+washer+and+dryer+combo PDF link annotation
    • http://trudogoliya.online/nujafadovotefiwknwwc.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/jfiegcb/digicel_recharge_online_fiji.pdfIn PDF document text
    • https://cdn.sqhk.co/pivifilogopa/xjbzwjb/busuf.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/40254738100.pdfIn PDF document text
    • http://alifan.store/hp_pavilion_dv7_laptopla00u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482402/normal_5fc94234eaa08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_6023725709c00.pdfIn PDF document text
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/f8469d709f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5fe7da70d98da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381737/normal_5fff227b27ed7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5fee4ffe5ebc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475382/normal_5fe9ac2f3a935.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387924/normal_5fef52d78765d.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/djejf9Q/god_of_war_3_toys.pdfIn PDF document text
    • http://republvinb.fun/planck_s_law_of_blackbody_radiationtrbw2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/what_is_the_central_idea_in_brendan_nelsons_sorry_speech_token.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 5680 bytes
SHA-256: 19bd3f2b0bc023ac398f1cd2e1ddb7e04942b41ca1692e9a2004f597a146dfac
font_01_sfnt_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 10532 bytes
SHA-256: 3b0f2b96d707c0c8748c3cb685e855f7ff9a5e66ef2fd6442479c943026d3115

Open this report in the interactive analyzer, or submit your own file for analysis.