Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ac50d21611a82c…

MALICIOUS

PDF

93.3 KB Created: 2021-03-14 10:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d78533b2f69a819274a5943d7bb5cb31 SHA-1: 9920293bf90b7c9ded2ec0d4365061915c25c979 SHA-256: 87ac50d21611a82ca23f148a01f6a85d31166ce357f525a83de7405f522324a4
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading a document related to 'clerical ability test questions'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://leonvi.ru/award?keyword=clerical+ability+test+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/retesixabe/jOqgihg/15157893539.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/jjiI5ij/hitman_2_gold_edition_ps4_digital.pdfIn PDF document text
    • http://graatorama.space/death_from_above_1979_moonlightrrah0.pdfIn PDF document text
    • http://vnds-v.website/17505635631j13i2.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/eicgdha/oxygen_concentrator_store_reviews.pdfIn PDF document text
    • http://cmbmarketing.agency/shipwreck_grill_yelppio0p.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/hgjfifz/xubudodojabe.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/Xghhagd/kezatesibisowomaxuliwilu.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/cvKgj0O/zokaxuvutebukiwapefop.pdfIn PDF document text
    • http://baby-slings.ru/25070255576sd87g.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/fdT1ugj/best_camera_app_for_samsung_s10e.pdfIn PDF document text
    • https://cdn.sqhk.co/lumozupa/4hgKMhc/red_dragon_knight_castle_crashers.pdfIn PDF document text
    • https://cdn.sqhk.co/boxadiweteve/ejgPihP/texawuzovisif.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/MhjSigf/root_android_phone_without_pc_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/iifgijj/ajazz_firstblood_keyboard.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/Yihggwz/bugekalozezamikudixiri.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/iThbLii/98573725961.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/tezude/fefuzefonepoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2dd03ec-fe36-46f2-b49b-804981de200a/refuwegesivesibod.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/99149156130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64dedda-8102-455a-b76a-f7a684863bea/how_to_get_a_dachshund_puppy_to_sleep.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/gosojubonepividivez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab718e5-a276-410c-b4ad-21c6cab35c7c/starbucks_barista_wage_california.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/bancarizacion_bolivia_2017.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_off00011f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F05 5512 bytes
SHA-256: 7487b14b3bcd4581541655864e36a6601ce160160a766b775f898e8e090b3936
font_01_sfnt_off000131d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D4 11116 bytes
SHA-256: 71c705e871762e97f49b8dbba0be935758f34ccebea81a2fc15867399cab61da
font_02_sfnt_off0001579a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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