Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbe27b3a750507b…

MALICIOUS

PDF

72.4 KB Created: 2021-03-18 20:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a46aa92abcceac995b20f90167f7fd29 SHA-1: e09eb3345fb9ca2fbd00c48a7b6af90b3c7f5d59 SHA-256: 0fbe27b3a750507bec664dca5a20793f693ff452ff3d17982b5a3ac9098ba33f
186 Risk Score

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 0.9998

Heuristics 6

  • 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 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://jumiwimov.ru/strik?utm_term=practice+of+statistics+5th+edition PDF link annotation
    • http://options.expert/luwatotafowidulavopukuz9o8l6.pdfIn PDF document text
    • https://kizinuraximi.weebly.com/uploads/1/3/4/4/134446503/tirozofa.pdfIn PDF document text
    • https://vewemojuwu.weebly.com/uploads/1/3/5/3/135392654/vakowoluze.pdfIn PDF document text
    • https://mozufakumijisa.weebly.com/uploads/1/3/5/3/135333945/bd9645337.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/2006_john_deere_320_skid_steer_reviews.pdfIn PDF document text
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/6232559.pdfIn PDF document text
    • http://fruitslope.online/nuvobikefuberiteseragesfap5r.pdfIn PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/jakivozaxuzozaxosoju.pdfIn PDF document text
    • http://sfr-espace.best/12180234514xomf7.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/20534897314.pdfIn PDF document text
    • http://zawopim.mygamesonline.org/what_is_fuel_injection_service.pdfIn PDF document text
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/805324.pdfIn PDF document text
    • http://krepezh.guru/chino_cappin_slimezfcle.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/boxujetanonikuv/96746269298.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/iphone_xs_max_wallpaper_template_psd.pdfIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_7ef3dfe895d64871a445048f281fe80a.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_5e94318e3cfe48bc8d708000f4a4e1bc.pdf?index=trueIn PDF document text
    • http://vekabun.myartsonline.com/war_storm_victoria_aveyard_series.pdfIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_05613bf15d2b46c08685a498b753b12c.pdf?index=trueIn 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_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 5204 bytes
SHA-256: b8d6a94226db3f9d04467b2cc850e11289093bbb891526631c7ad142db641c99
font_01_sfnt_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 11564 bytes
SHA-256: 55f8ae5f0e4862ec3aec92136f3542cf160116ea7ed818fdc9525489e4897b2e

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