Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8542f314d21604…

MALICIOUS

PDF

83.9 KB Created: 2021-04-07 22:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e351dadaed0989a22318e12353021094 SHA-1: 286c3064b30f773edbbe99856c5656a52848abbf SHA-256: ed8542f314d21604d5698c0fcd48a47ec0d9b8d1d5e4ad6f2d7a9c1f9db024f3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://lozipotod.ru/strik?utm_term=what+is+the+xfinity+modem', which is likely a phishing lure. The document body, though heavily obfuscated, appears to contain search-related text, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=what+is+the+xfinity+modem PDF link annotation
    • https://cdn.sqhk.co/gagobuniponi/biagcgg/ridirexefawup.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepelela/hiNbgiG/mamuwejiradifupozore.pdfIn PDF document text
    • http://busibear.com/646202601479ld0o.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/f03iagh/5438586357.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/ImjiNbY/vamofepek.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/Hhfbjhw/zowoserubiv.pdfIn PDF document text
    • http://jakor.pro/1850094913n5i6z.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/jaNjhN6/tirovu.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/oN7coge/sopunazevi.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/NhfyJ44/diselovabomosinilexabenaj.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/Wih5hiC/nail_salon_near_me_prices_gel.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/remuv/nfl_week_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1895deda-9381-4022-a758-18301ec44e4b/bilediwatasudufutapowuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7a1467-9106-442b-9a36-9087f5da9c59/23880332560.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/pexexusep.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/92800658754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24bc049-05b6-45d9-ae36-1c9d5fad9123/digital_system_design_using_vhdl_charles_roth.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_off0001097c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097C 5204 bytes
SHA-256: a0405aed6af8ef999b377f942e6b55d6bf8af7178ea0cfd019660626515798e3
font_01_sfnt_off00011b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B26 11672 bytes
SHA-256: f0de999c8a2009e475d68b6c00b94c8132a45d068ddf21f36e68303ffacd51ae

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