Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdc7175a4bc0c55…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 19:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0b44afb9178dcc4fdab72844fe3c340 SHA-1: dc1318a0bde2a59a615116872e1836e7706bf2ff SHA-256: 6bdc7175a4bc0c555ff92d612c937a56b3725e3a26f4645aca5be84969b0768a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=fifth+grade+math+division+worksheets PDF link annotation
    • https://cdn.sqhk.co/nejisakatok/jgb4ijV/say_hi_in_japanese_language.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/mhjjhig/dragon_ball_heroes_2_3ds_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/duwefetufe/hcggsnU/alicization_rising_steel_guide.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/what_does_it_mean_when_fire_alarm_beeps_every_few_minutes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_60286723eae38.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/Ehbgcic/christian_easter_coloring_pages_for_adults.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5fe74fcfa44d5.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/nanasulegumazidanisej1fpi.pdfIn PDF document text
    • http://italiahot.space/8620543325hdrei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5fcd64b4a82e7.pdfIn PDF document text
    • http://stat-index-co.com/zoveralewekimigituvibira6afzl.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/49236451971.pdfIn PDF document text
    • http://smartycredit.info/98811741917lznvm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_6012dabce9bb2.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/why_isnt_my_furnace_lighting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6049786db6112.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/jdhfhbX/tulejoxovuguxirewo.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/rakabexozu/vijuwunevemubed.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/22238248293.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/pozamijeno.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/facebook_lite_apk_free_old_version.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 5460 bytes
SHA-256: 07c95fea8c4bd42181af04fb15b2252c96940cb74ea5acb27cea0013acefdde9
font_01_sfnt_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 11040 bytes
SHA-256: ed436d0c6b741b22b029507131937284f9432f93207cb49f025dc588e46cdd85

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