Malicious PDF — malware analysis report

Static analysis result for SHA-256 887a5cb627848c7d…

MALICIOUS

PDF

82.8 KB Created: 2021-03-03 12:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cd395aaa6ad07a1a20f34e3623de47b8 SHA-1: f30028a5cffe9842a12cc6296c9172a141c8992f SHA-256: 887a5cb627848c7d358d30120b05d8082486301e37a070e02a4685403f897832
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=jane+austen+book+club+jigsaw+puzzle PDF link annotation
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/muxitanobedezep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421214/normal_600c1fff9820f.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/97748543250.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/labidavuvidufe.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/basketball_shooting_drills_for_high_school.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/igcse_chemistry_textbook_fourth_edition.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/venilelexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_6026da8ae8a92.pdfIn PDF document text
    • http://lifeeuro.info/metta_world_peace_china_statszt44s.pdfIn PDF document text
    • http://fruitslope.online/253863940971a8vn.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/poulan_pro_pr621_owners_manual.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/honeywell_quietset_8_setting_tower_fan_hyf290b_white.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/how_to_do_colored_pencil_art.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_6015655d15907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titasukutisun.epizy.com/xukixomerigezugogepip.pdfIn PDF document text
    • http://bekisamusexasu.rf.gd/grade_three_spelling_words_canada.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/2020_lexus_es_350_f_sport_lease_deals.pdfIn PDF document text
    • http://niwibobimitezof.epizy.com/the_size_of_each_exterior_angle_of_a_regular_polygon_is_18.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 8

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_off000104f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F5 5416 bytes
SHA-256: df6447a7bbb4752d6bf07380d961f8f3d06eeb1af1193188445ac8efc6a96b26
font_01_sfnt_off0001179d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179D 11276 bytes
SHA-256: f320bb97e08529632437f202f062d79600c605950af944b04880d38002474919

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