Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c4d4d5d1ce864e…

MALICIOUS

PDF

75.4 KB Created: 2020-12-26 23:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8188f8cc3c64176aa806e1a87c550d54 SHA-1: 9b5a65fe272ce067f8519f68c8787cbdc29ff72a SHA-256: 84c4d4d5d1ce864eb5b8180611bf8597ef9a04136af95c47f5b3af279fba3900
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to 'picture collage free download for pc'. No scripts were extracted, but the presence of external links and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

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://trafficel.ru/strik?utm_term=picture+collage+free+download+for+pc PDF link annotation
    • https://cdn.sqhk.co/sepufaziru/TcBnxav/metronome_beats_pro.pdfIn PDF document text
    • https://nuxowodevuj.weebly.com/uploads/1/3/4/6/134609076/gotifazuvod.pdfIn PDF document text
    • https://cdn.sqhk.co/zimevegi/ijMCshh/fun_words_that_start_w_j.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/ihishdC/pemowomizivomorikupuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/ggcwja6/bdo_reload_easytrip.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/7996185.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/jbjmgiT/action_movie_hero_name.pdfIn PDF document text
    • https://mijekuwovosi.weebly.com/uploads/1/3/4/3/134321571/bamudorajene.pdfIn PDF document text
    • https://cdn.sqhk.co/vawikepaf/RJpVLnZ/66073488296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulozor/zisetaxuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/45115856094.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/vorurigamefozowixesilezeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b74577-b563-4439-b30b-cab16af7e631/85963631314.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/92595715786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d8920e-d697-4ce6-bdd1-1589fc88cc16/putape.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_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 5236 bytes
SHA-256: a47105f566782bbcbbe3e8b23cca40bc1db0c192e1408defc3d969ae454a3620
font_01_sfnt_off0000fcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC6 10632 bytes
SHA-256: 527283b05bc7218117afaa7b5a931777540209895b8635e8acb07abcf043f374

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