Malicious PDF — malware analysis report

Static analysis result for SHA-256 2052e804c7b0cf1b…

MALICIOUS

PDF

115.0 KB Created: 2020-12-07 22:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8129ccd2f45f1963eeda009a4667ee7c SHA-1: 1d85dd47c9f32a5ae3c7722e983a9922444c9a6f SHA-256: 2052e804c7b0cf1b57c385ba62b19d629b03ce0308645fefa99b12a8235b7570
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=insect+study+merit+badge+pamphlet', which is likely the primary indicator of malicious intent. The document body, though heavily obfuscated, suggests a lure related to an 'insect study merit badge pamphlet'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=insect+study+merit+badge+pamphlet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5f99c4e2a977a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5fa51972c46e3c965f81/1606377381398/zabeviwijovabiri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3a0e816f6d44b07cfb956/t/5fc7ae5f48d5672cfb47562f/1606921825461/micro_war_download_utorrent.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5054dc6d96458363c81e8/t/5fc5459d2dd96f59189ad174/1606763936239/44488206220.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52fc0e5c7695ca9b77d8b/t/5fca242f1a258d244fe6e4c1/1607083056451/77631682341.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fff4e98326c02072db6/1606373375692/dont_answer_the_door_chords.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a12cc6d9645836424050/t/5fccc67e978da30c56fb2c54/1607255679261/3100788384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703fd4ee-786b-4007-b319-11cb3941eda0/fugodifuxilusiputekonarur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62223c12-01d5-4537-9c6d-569f204d983d/sagafidinovebuwowosarates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988bd692-acfe-4dc1-af1b-d74a81ed3272/tokujiro_the_glutton.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3675ebe9b6939511ac1b2/t/5fcdcdc89aa2de0c64b4ad33/1607323082181/chicken_tapeworm_in_humans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d0256c-31d9-4e69-82b1-9c0b2df19c01/tiwemaselugewudakeva.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_off000161d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161D4 9896 bytes
SHA-256: 3fb14a7865aecc274f7e93b0746f7702d1bcbb521a508d6d211b7f19740a2366
font_01_sfnt_off00018143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18143 5668 bytes
SHA-256: dff3f943210b94a803a236e5368b54fe5334db9492ed166f4bc47fa3636d76a9
font_02_sfnt_off0001945f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1945F 12364 bytes
SHA-256: 2cc2e67029de356fdbde5cb2c3689ad18eb5be068ad6d52d475fb4485ec8f929

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