Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffadca2d26cbe1a…

MALICIOUS

PDF

65.8 KB Created: 2021-01-17 11:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 848d470c53153675a69df90e66aaa8e6 SHA-1: cb17b6f14d1633a00a5617688091805a3e9810ab SHA-256: 7ffadca2d26cbe1a441e9b33f3a7f1a7943a1f6eb8cc5c7d0de73ca204e4640c
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document is designed to drive traffic to malicious sites. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

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
  • 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.
  • 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://ggtraff.ru/123?utm_term=stormbreaker+book+pdf+download In PDF document text
    • https://cdn.sqhk.co/sazalevimit/XjTdheJ/96045385556.pdfIn PDF document text
    • https://kokopepexepu.weebly.com/uploads/1/3/1/3/131379351/kasomoted.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/hchicBC/ninja_fighters_multiplayer.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/nunesopiva-vigaxakibes-wobomorawam.pdfIn PDF document text
    • https://cdn.sqhk.co/remavaveso/Vij3fha/3d_paper_cut_art.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/HmidhfV/dufijadizoniperex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/chemical_bonds_and_reactions_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/delta_airlines_flight_status_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/xevukekanugasamemezimud.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/kujotopafene.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/jennifer_lopez_sister_news_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/labimudesi.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/xopazefiniselukikumolumog.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/12458414016.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_off0000c346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC346 5408 bytes
SHA-256: 5b3a6f27d9ec397eca399254d6ca8ee74aa602a63930b4e7eab062821a3b1651
font_01_sfnt_off0000d5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A5 10776 bytes
SHA-256: 918b0c5ce57c3fc2238a0e80a7952fcf4ec2bfcdd899523ab624743ac9f0b78e

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