Malicious PDF — malware analysis report

Static analysis result for SHA-256 90084eb2b32c8af4…

MALICIOUS

PDF

74.4 KB Created: 2020-11-13 17:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6bbe12b1b6b2f6a8b21fe7e936b7ed23 SHA-1: 8cf8fed597b7fdf606867c30bd58ee8bc6510b39 SHA-256: 90084eb2b32c8af4807a2c5ec80eba0cec9f5124ffee0d0ecb8ba80b4c6b332c
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, disguised as a search result for a technical topic. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/strik?utm_term=aws+cloudformation+package+cli+command PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f99bebeb0560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8844518d87c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f92e6aa2c7b5.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/leguvefu/resumen_del_aparato_respiratorio.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/il_bacio_arditi_spartito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a75607e-82a6-4be2-ab6d-6dcb1e978511/tenoluvuzasafili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b120e7-9fd2-48bf-a5ed-f55c089ac8b2/27561903180.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/3734756352.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/kusufig.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/17028609971.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/vutofotujavukexog.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/definition_of_characteristics.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB95 5500 bytes
SHA-256: b47d3ee224b212fb94cd835e26d897ac5d756f418a114e56d1606645dac096ea
font_01_sfnt_off0000de34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE34 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000e6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C2 11624 bytes
SHA-256: f30a1abad43e0d945bda703fd2b44a2e92b928a93b1b7ee387b8955aa53a35b6
font_03_sfnt_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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