Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c585aa0767ec81e…

MALICIOUS

PDF

80.8 KB Created: 2021-03-02 19:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dec41b40e0a0a37ddc828218f7551733 SHA-1: 87504714c93bf7484993f9e2b97e0846a498394b SHA-256: 5c585aa0767ec81eefa0c8ea391a0cfc490b86470db9a2d2d86907061a4e5347
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to link farms hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=god+of+war+ascension+boss+guide PDF link annotation
    • http://blue-tick-central.com/438336631454cfz5.pdfIn PDF document text
    • http://online-bestshop.xyz/534995044977fb2y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470981/normal_5ffb2019b8a73.pdfIn PDF document text
    • http://jnatural.space/22690815583hz0mr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_6024fb74b7318.pdfIn PDF document text
    • http://pudevivufug.22web.org/melezajitalexem.pdfIn PDF document text
    • http://wonder-ita.space/ejemplo_de_proyecto_de_investigacion_educativowpx50.pdfIn PDF document text
    • http://construt.site/frying_pan_reviews_consumer_reports38car.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5fe6f5a14e640.pdfIn PDF document text
    • http://lifeit.pro/6087988662615j12.pdfIn PDF document text
    • http://shoop-fp.ru/batman_death_in_the_family_interactive_movie_wikiho83f.pdfIn PDF document text
    • http://idealica-official-it.website/ball_mayhem_online_games7vt3.pdfIn PDF document text
    • http://fabermanufacture.ru/79400103934660sl.pdfIn PDF document text
    • http://closemaze.com/army_battle_buddy_policy3h9bk.pdfIn PDF document text
    • http://dunizajo.66ghz.com/dibixonoxubodile.pdfIn PDF document text
    • http://teren.fun/lolepotulezuwokikikhwcd6.pdfIn PDF document text
    • http://clyb-wylcan3.space/37715236090vxywc.pdfIn PDF document text
    • http://pristav.pro/28707143089p8pmt.pdfIn PDF document text
    • http://liketime.online/wupatulovetumumetefegulufy0m5w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445118/normal_5ff0c1ad5f044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://timaroxakex.epizy.com/atrial_fibrillation_guideline_2019.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 5420 bytes
SHA-256: 6a8a94bcc0618fc66a33297261acb82db9785161d46df6221a76173a22b2f091
font_01_sfnt_off00010237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10237 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_02_sfnt_off00011217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11217 10196 bytes
SHA-256: 0fe3e4fa6d5e3eb1a38e4cc7477d77dd37fb08a9b75b45db334b4877457ce11f

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