Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a34cc1537d4216…

MALICIOUS

PDF

103.9 KB Created: 2021-02-28 10:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 900e9010b8c4649cac9e4509b73a9f4d SHA-1: 2486b0b486bd2f4407cac785498d3e24c976521d SHA-256: 63a34cc1537d4216c410db5cddf7899d0630099a1d4eeef4b3da836f2ed2bc98
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to search queries, further supporting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://nipisod.ru/award?keyword=how+many+carbs+are+in+a+sonic+hamburger PDF link annotation
    • http://fiwuwoxas.22web.org/bongo_movie_mpya_2019.pdfIn PDF document text
    • http://yeswins.space/zojusiragilezapoqvhjz.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/70832616153.pdfIn PDF document text
    • http://feruwikabi.iblogger.org/kepof.pdfIn PDF document text
    • http://fogozuvonuw.66ghz.com/blues_for_mister_charlie_download.pdfIn PDF document text
    • http://citimart.online/carpentry_and_joinery_volume_4zdj2g.pdfIn PDF document text
    • http://kafikiwamavo.22web.org/amazing_spider_man_apk_data_free.pdfIn PDF document text
    • http://itasummer.fun/charriol_ring_size_guidesl1wt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xesujenomudot.epizy.com/85890170219.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/how_to_tell_how_old_a_marlin_336_is.pdfIn PDF document text
    • http://joluror.rf.gd/bloons_td_6_chimps_guide.pdfIn PDF document text
    • http://sisawujeza.rf.gd/beatles_piano_sheet.pdfIn PDF document text
    • http://dofumuligo.rf.gd/baby_love_me_english_song_ringtone.pdfIn PDF document text
    • http://fakopasetiboni.rf.gd/novum_organum_english.pdfIn PDF document text
    • http://pajuniwosedi.rf.gd/new_holland_451_sickle_mower_hp_requirements.pdfIn PDF document text
    • http://zomimek.epizy.com/is_ergobaby_omni_360_worth_it.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_off00014dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFD 5476 bytes
SHA-256: 1f1c17bf4585c976bc1e097ea3382cacb3f10ab49d0b1c4b15705194b2540b13
font_01_sfnt_off00016087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16087 16132 bytes
SHA-256: f34c32b4bc47d55d575ecbdb39bdb8c4fd91a8adaccde29d2460e66dfb2cf796

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