Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bdf92c277d3256c…

MALICIOUS

PDF

89.8 KB Created: 2021-02-20 20:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e855811a7290ff33beb78ea252b4fd1e SHA-1: 2a672dc8ddec66eb391aa1a93e949aa6ef59ea6d SHA-256: 4bdf92c277d3256c0fe25e67bf6c06b575e5d6253eaa6d9ba19049f5e1124fa2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=how%20to%20fix%20overscan%20on%20tv%20windows%207 PDF link annotation
    • http://takipleskazan.org/bjsc_syllabus_2020_downloade5drf.pdfIn PDF document text
    • https://wojizenufojanog.weebly.com/uploads/1/3/4/7/134724603/palufuzuzilu.pdfIn PDF document text
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/9390597.pdfIn PDF document text
    • http://zatoboyvibor.fun/rane_62_driverjp36z.pdfIn PDF document text
    • http://milanomoda.site/nisimubunivijimesuposjfftr.pdfIn PDF document text
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/4195932.pdfIn PDF document text
    • https://tedamitaza.weebly.com/uploads/1/3/0/7/130740371/f0a2941a5cdf84.pdfIn PDF document text
    • https://kevulukopefot.weebly.com/uploads/1/3/1/4/131453006/bee64305d6.pdfIn PDF document text
    • http://gaydating.world/34883184249tvvcz.pdfIn PDF document text
    • https://nebobaxewakizix.weebly.com/uploads/1/3/1/6/131637309/37ffee423af.pdfIn PDF document text
    • http://myfirstsite.xyz/bahubali_full_movie_telugu_mp428tkq.pdfIn PDF document text
    • http://helplnstagram-confirm.com/16605143570isfsy.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/vigevot/19350216688.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/dozipowulamutib.pdfIn PDF document text
    • http://xebizeluzifavi.rf.gd/my_airtel_apk_old_version_free.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_off00011f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F07 5244 bytes
SHA-256: 3ad48202458f74ce21a67c91bcdf830b3a2ec7f656e61641ccecb24d2353f559
font_01_sfnt_off0001310d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310D 12392 bytes
SHA-256: 1dcfa0dd0814716413fc507da96e26efb70e08a7f854b5618f763726a14fc6a3