Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4d080127e2615c…

MALICIOUS

PDF

87.8 KB Created: 2020-12-18 20:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2db1b1d7f12db4cf06fa5a02358da9bc SHA-1: e62fbc643aa28b6f920d213300fa0775d2bceff1 SHA-256: 8a4d080127e2615c5aeeb3a5730cd3d1ef3f7876ad5051b79edb2185549bc82d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, 'https://trafftec.ru/strik?utm_term=honda+civic+spoiler+hatchback', is directly embedded in the document. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=honda+civic+spoiler+hatchback PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5fd2d8d054827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fcd3b741f251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f913ad88bfcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5f94a4c6b6337.pdfIn PDF document text
    • https://xofokoraziv.weebly.com/uploads/1/3/4/7/134748977/6cacdac8df4f5b.pdfIn PDF document text
    • https://nexajatolotol.weebly.com/uploads/1/3/4/3/134308242/tibijit_naminoweselexu_laxavukixis_virafenifagulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fd3cc8cd4089.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://s3.amazonaws.com/leteraxewe/letonoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618be166-6fc3-4e57-adc1-d030c55aba7f/harbor_breeze_remote_a25-tx015_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/50068786548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e39236f-3fa5-4c38-b7f6-f3b1555f3574/uworld_step_2_notes_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/apple_airpods_android_volume.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001086a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 5172 bytes
SHA-256: 8739ad6e83609e7ed751b3910ad1228cfb10851e291319df053875830a25db19
font_01_sfnt_off000119f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F3 13140 bytes
SHA-256: e1f3c4fa4486cef7c0c52a132e7a7eb2b784cbac45238d8579ba2a3ddbd363f1
font_02_sfnt_off000143df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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