Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76c405ae71a2970…

MALICIOUS

PDF

70.0 KB Created: 2020-12-16 19:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cefe826919912229816b1113d5c741cc SHA-1: dc09a4b9b012f1fe97c443743a31be95b96aff8c SHA-256: d76c405ae71a2970ec7b2006791cc26b5b05ded3588d1010fa6b7bd217505268
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a malicious link farm, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=horry+county+register+of+deeds PDF link annotation
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/fe3114d537a9.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/zimoje-kovezux-wuwox-rejakevamazole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_5fbfe3b83d891.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/922731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_5faeef3ede922.pdfIn PDF document text
    • https://wowujisalot.weebly.com/uploads/1/3/4/3/134349860/taraxirilatisorulobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f87f9efe02c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fc6d94d79056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f87e588744e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5fd2e7540caa8.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/a39fab82d.pdfIn PDF document text
    • https://nutarubanamu.weebly.com/uploads/1/3/4/5/134528768/b5db152420.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c16ea5e-b028-43ff-89ff-656137a7aaab/lojuzegunapasunefukaxuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c1781d-007a-491d-862e-54d7000f41b1/73699825706.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_off0000c77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77F 5008 bytes
SHA-256: 7b4280b3728eb84aef91eb2dd122861a84910a7e402e98397318a63af1314787
font_01_sfnt_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 2744 bytes
SHA-256: dae0f12506c17deaa818396cb86411da2f7a72f10e575d6fda98e021880a3e82
font_02_sfnt_off0000e44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 10772 bytes
SHA-256: 195908175a6d216be2a7c784f249324bd61ab2a51fad0275c0d72d5a9f754a78

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