Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a549fd59e2e222d…

MALICIOUS

PDF

76.0 KB Created: 2020-11-29 23:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dd7b32e2bd2674366b740f7fa9fb438e SHA-1: 18dff65a53585f99dbb13e905ea2da398d21712a SHA-256: 7a549fd59e2e222df59fe2fb01f7c2d8519d17a05b5569a620f0a4df995396b4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=business+account+ledger+excel+template PDF link annotation
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/f94211acdb5be0.pdfIn PDF document text
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/6de45cf74.pdfIn PDF document text
    • https://jugusunoju.weebly.com/uploads/1/3/4/6/134625161/1330266.pdfIn PDF document text
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/2420650.pdfIn PDF document text
    • https://sekamaxe.weebly.com/uploads/1/3/4/5/134590712/kelenejotewodib-joluvezoxo-vapisivowegimu.pdfIn PDF document text
    • https://dolaseluxi.weebly.com/uploads/1/3/4/8/134871763/bonijizekotot.pdfIn PDF document text
    • https://wovuxitijijigot.weebly.com/uploads/1/3/4/5/134524902/kutaxej-xojiramez-jipuv.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/9018556.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e5f1bb51-cc14-4c8a-8684-8cfc344891b6/wwe_2k17_game_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beeac89c-3e41-4e39-9d34-691f7dcd69b9/8184313807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbdceab-6c00-4b7e-92c8-93a3745308d2/92062635895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06bde98-aa65-44a7-a280-64f669f07bd7/47064317503.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_off0000de73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE73 5392 bytes
SHA-256: 69962b8f40c7c1b5d3dbc46acdf26a8b9784d13ee5118d3b7dd47b830e6c95e0
font_01_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 10632 bytes
SHA-256: 52b0c801172397ffbe1f2e6d9a1b5282c9f82bfbdafe6034addde4f5061ced56
font_02_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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