Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9cbbe0a5fcb5ec…

MALICIOUS

PDF

87.1 KB Created: 2021-02-28 06:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f99f994f242ae0a88c9bf6ec186c54e2 SHA-1: c092fafa07ad20fecf68f50d9c0f1df6cafdadff SHA-256: 1b9cbbe0a5fcb5ecc1cd14beae788c59477bf42fefae7aa26ea5e13593fb5b67
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a domain that appears to be a lure for a service manual, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URI indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=nissan+d21+service+manual+pdf PDF link annotation
    • http://bidizujimon.getenjoyment.net/ge_pension_contact_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_6001a9ecdabc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423714/normal_5fe25f3ae3420.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/why_is_bio_wheel_not_spinning.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/HienbWw/seven_deadly_sins_grand_cross_facebook_friendship.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mowelafawugek.epizy.com/98216277242.pdfIn PDF document text
    • http://dovukixopajiduw.epizy.com/75320809987.pdfIn PDF document text
    • http://somepezepu.epizy.com/jukoxewifasivokimazogili.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/zivapopudaradimisu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/bootstrap_4_template_ecommerce.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/form_a_sentence_with_the_word_acknowledgement.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/bone_marrow_aspiration_cytology_report.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/duvoweti.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/jorudenufonupobalojevefi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E9 5516 bytes
SHA-256: 8678e2fd3887f2574e37b6848ed1f853fc7cdec06ac0a9c301ded517f95d6710
font_01_sfnt_off000129ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AB 11500 bytes
SHA-256: b53b05f499b702ae3b3ac6bf68bfe3540d956c694d4a7a647f77e3ea1735ec74

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