Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0870c862177d4ed…

MALICIOUS

PDF

73.8 KB Created: 2020-12-27 12:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f26b749082a47721d97608b4f133e0f5 SHA-1: 7765db9b29c6460f3e034b4120ec9ffba4869dae SHA-256: e0870c862177d4ed2a77c5c027af58d7c42552031ba5b91439490e39f25fa29e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, likely to manipulate search engine results or to host phishing content. The embedded URLs, such as 'https://traffnew.ru/aws?utm_term=decimal+number+line+pdf', are suspicious and likely lead to malicious sites. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious activity.

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 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://traffnew.ru/aws?utm_term=decimal+number+line+pdf PDF link annotation
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/gowabapas.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/xutevugamedu.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/kenadedeje.pdfIn PDF document text
    • https://nebunabimumebu.weebly.com/uploads/1/3/4/4/134480995/7663900.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5449688.pdfIn PDF document text
    • https://durezeneb.weebly.com/uploads/1/3/4/2/134235042/vegogazomepozumonojo.pdfIn PDF document text
    • https://bagetakibejo.weebly.com/uploads/1/3/1/8/131871627/1e3c8c21e4f.pdfIn PDF document text
    • https://pafofenolaf.weebly.com/uploads/1/3/4/6/134668810/zipuxa.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/mijedusovineti/majix.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/nasogastric_tube_insertion_guidelines_nice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70719232-e3d2-4748-90df-3c977b833d98/runuzazafewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1212aa-8bec-436b-b116-823edd6f0fa7/38603070714.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/20214148483.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/witexowukasepexare.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_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 5260 bytes
SHA-256: e4855cc502e2db1077e74769717ee9e35a331d7070eca6e5c257b9465aac6743
font_01_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 10700 bytes
SHA-256: 73b984056e9ee2bea7d8ccde564a52b9e8c5ccfddd29dae1ca10977ec403c0cb

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