Malicious PDF — malware analysis report

Static analysis result for SHA-256 addb7c27ac07a1c4…

MALICIOUS

PDF

72.8 KB Created: 2021-03-27 18:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f1454ffd25c3659be4075dea09517ea9 SHA-1: 933cea237a0285fa5c16c985a4134526842d1184 SHA-256: addb7c27ac07a1c4e76f1c0ddefb96e347ab18f9c99abb09e7fea48109a4fd94
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a technique often used to redirect users to malicious websites for phishing or to download further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://pelibifir.ru/123?utm_term=guitar+sheet+music+pdf+free PDF link annotation
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/9c784b5.pdfIn PDF document text
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/00690e65addd61e.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/sosit-mikexowub-weguxopojosax.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/91bd0.pdfIn PDF document text
    • https://rabivavas.weebly.com/uploads/1/3/0/9/130969809/sejaredulenuwa.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/547c2e3085.pdfIn PDF document text
    • https://padilokemim.weebly.com/uploads/1/3/1/3/131381900/9697446.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/c4feb2b8-9178-464e-9330-2a08acfb85a9/wepuxugosasoxakom.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/prescription_label_template_microsoft_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab122a2a-15a8-4e52-a9bf-7572ba5feb28/nuwumivikonevugox.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/69339589996.pdfIn PDF document text
    • http://radoneg.rf.gd/iron_mike_pitching_machine_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/99024053398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855638a7-2834-4af2-8eb8-a39c316c1f03/how_to_reset_apc_smart_outlet.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/43817429665.pdfIn PDF document text
    • http://mixazodusif.epizy.com/nobujedumuk.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/7264129220.pdfIn PDF document text
    • http://fefogisupiruro.rf.gd/cambridge_primary_checkpoint_past_papers_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e78a84-8401-4677-9348-457a2531c96d/62234792598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4862ffbb-c0fe-4356-b627-06749b55d518/37277087989.pdfIn PDF document text
    • http://kaxixuzebupajal.epizy.com/asrock_z370_pro4_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/namevapuzomav.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/32223306613.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_off0000df89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF89 5392 bytes
SHA-256: 8120501938b1b49a132a687731e4b022725c84fa611226552086f7133304578e
font_01_sfnt_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 10484 bytes
SHA-256: ad1d9c48be8a6a31a63091edd6faec5f4e7641c404b290cdc2340dcb183bb944

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