Malicious PDF — malware analysis report

Static analysis result for SHA-256 be52e82fafd1ece6…

MALICIOUS

PDF

73.5 KB Created: 2020-12-23 20:12:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d0f8af216f82de3596d6a5aa58dc09 SHA-1: 151ffd48a3a86ff5021b4ed0aab99f800e55fd08 SHA-256: be52e82fafd1ece688e6ba0526006137d222016fda2fc2594f2c4da75138edc0
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI usage and ML classification. The document body, though heavily obfuscated, contains text related to 'Lenovo phab 2 mobile data turns on automatically' and a URL pointing to 'trafficel.ru', suggesting a phishing or scam lure. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this, indicating the document is designed to redirect users to potentially malicious sites.

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 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://trafficel.ru/strik?utm_term=lenovo+phab+2+mobile+data+turns+on+automatically
    • https://rezolokad.weebly.com/uploads/1/3/4/7/134718373/4d1927d48661e3c.pdf
    • https://tefitosuwit.weebly.com/uploads/1/3/4/4/134478986/pevazegotoben.pdf
    • https://cdn-cms.f-static.net/uploads/4417129/normal_5f98d6f5c4ce6.pdf
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/tasinoxozozeso.pdf
    • https://cdn.sqhk.co/ledumixifer/Jt3ictY/best_craft_furniture_mountain_wi.pdf
    • https://pozimetotekiv.weebly.com/uploads/1/3/4/3/134339641/6de4199474.pdf
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5fa204223ddda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/baritexovopa/gifaluxup.pdf
    • https://s3.amazonaws.com/henghuili-files2/3311407962.pdf
    • https://uploads.strikinglycdn.com/files/ac7e9aa3-fb6b-4a32-a98b-4427f0857fd1/jemowugav.pdf
    • https://uploads.strikinglycdn.com/files/9585c9f9-1b26-4a86-9fcd-db12f65b4979/innova_code_reader_3040_manual.pdf
    • https://uploads.strikinglycdn.com/files/1fb77763-eeeb-4197-96b1-2576b1217d3a/divajumelukemiziwi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d398.bin
a0d5c2f91b6835ca034cadbe32971e3d4265d7a60aad1ef1905f3033432eee69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 5572 bytes
font_01_sfnt_off0000e663.bin
a812bef797ad9e5776fa862f9b27852dc0d291ae863f96bd1ad46101ad4975d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 10628 bytes
font_02_sfnt_off00010aad.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAD 4324 bytes

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