Malicious PDF — malware analysis report

Static analysis result for SHA-256 c477d65133eee62d…

MALICIOUS

PDF

82.0 KB Created: 2021-03-20 07:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 050b80236bb75f918675dc1a281058f4 SHA-1: c26d4cd2662b319d4a894cd700100418c92c1bc8 SHA-256: c477d65133eee62d4fa6e26d7bdd41d41baacd5c11a5a414433da92424d7b24e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://golowaki.ru/wix?keyword=docooler+m9s-pro+manual+pdf PDF link annotation
    • http://nijuwebil.iblogger.org/55767168103.pdfIn PDF document text
    • http://dipewafotowagu.22web.org/40270767541.pdfIn PDF document text
    • https://bimonodinedijov.weebly.com/uploads/1/3/4/6/134697137/gimuwarotupi.pdfIn PDF document text
    • https://zifimegepero.weebly.com/uploads/1/3/4/6/134601706/c2158.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/xenulapuga-migupolagesuw-zujud.pdfIn PDF document text
    • http://wejnpowk.space/abu_garcia_silver_max_reel_partsyl2gu.pdfIn PDF document text
    • https://tijagure.weebly.com/uploads/1/3/1/3/131398232/bogixogivopa-bidubopalis.pdfIn PDF document text
    • https://titoduxelet.weebly.com/uploads/1/3/5/3/135399046/xozupuwazadil.pdfIn PDF document text
    • http://avto-document.site/how_many_pages_does_diary_of_a_wimpy_kid_hard_luck_have9a7g5.pdfIn PDF document text
    • https://nawenakugod.weebly.com/uploads/1/3/6/0/136048640/8505187.pdfIn PDF document text
    • http://drilltech.info/evh_5150_iii_lbx_15-watt_tube_head_reviewj1p24.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/nerolokurivutuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460055/normal_5ffcbb761a8ac.pdfIn PDF document text
    • http://bopalinowojege.iblogger.org/jezakeporu.pdfIn PDF document text
    • http://tekaxaxiwirika.iblogger.org/pijutikavazopokadini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491687/normal_6049a3e488a2b.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/naginoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvoxezol.rf.gd/easy_smoothie_recipes_frozen_fruit_yogurt.pdfIn PDF document text
    • http://kusegewamuzazod.epizy.com/kiboverefevipexuzugaxo.pdfIn PDF document text
    • http://tadidej.rf.gd/anuncios_publicitarios.pdfIn PDF document text
    • http://gisabolawavurad.epizy.com/poultry_feed_formulation_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 2912 bytes
SHA-256: add48b004ae9e0f775ee9c3900c1e55652a45e2f3f86ca2d1a3c9c8624cf1484
font_01_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 5488 bytes
SHA-256: 2a245e6d7ab69134aa1815eff7e42a0b8665317d7848e750f7fa99615aa9343e
font_02_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 11880 bytes
SHA-256: c1584ad1c6d5c4971fe1b4733b4aaf0e106b8ca636bf0e7891c7deca77a068de

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