Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92a4f299005bc1c…

MALICIOUS

PDF

81.1 KB Created: 2021-05-07 23:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ef76cf75878bdeb910e0813b343b7ab SHA-1: b8feaff2357b02b27273f2f093daf0a553864c79 SHA-256: c92a4f299005bc1c9a447ad91d6b78b2e937027a7e056b650f2239d535a1eca1
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with the primary URL being `https://nipisod.ru/strik?utm_term=how+to+invest+in+emerging+market+value+stocks`. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing attack aiming to redirect users to a malicious site.

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://nipisod.ru/strik?utm_term=how+to+invest+in+emerging+market+value+stocks
    • https://cdn-cms.f-static.net/uploads/4401559/normal_6035f8b752b04.pdf
    • https://cdn.sqhk.co/modesinilofe/jhijijj/libofanuwojekavoxogitiren.pdf
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/xivujosen-pitojivubevipap.pdf
    • https://cdn.sqhk.co/tosuwukiwate/aherjhT/fibum.pdf
    • https://sudejija.weebly.com/uploads/1/3/5/3/135390998/3c9c07b0e6.pdf
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/9010ab175d9c147.pdf
    • https://cdn.sqhk.co/kawabewiwof/2hdHqMZ/zeboxep.pdf
    • http://xowozumevabig.66ghz.com/matekimokeregemilowogela.pdf
    • https://static.s123-cdn-static.com/uploads/4380230/normal_5ff6135da7a61.pdf
    • https://cdn.sqhk.co/napumefu/ILgfwkP/pubasipubofejasejojanofe.pdf
    • https://latufuxi.weebly.com/uploads/1/3/1/1/131163666/ledozepifoveva_wozope_buzot_xepevatofo.pdf
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5fd09a2b9ef6e.pdf
    • http://sudesisobibimit.22web.org/41797216135.pdf
    • https://cdn-cms.f-static.net/uploads/4366982/normal_604a5756d6bad.pdf
    • https://cdn-cms.f-static.net/uploads/4481820/normal_60251c083b0f0.pdf
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/1939037.pdf
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5ffbfcd866d85.pdf
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/jogiwifoduz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rixupod.rf.gd/nerenelogegopajo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff38.bin
165fab7947263c61f158e530d0bf9f3d1288352e2c768f073c3cb3d415dd75db
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 5296 bytes
font_01_sfnt_off0001113f.bin
53600ba3def9789478dad05c13daf523662162273720edbeffb1f93598ba493b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 10940 bytes