Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0756b951438b15b…

MALICIOUS

PDF

86.3 KB Created: 2021-02-06 10:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 38a92ad841a3a502e8f7e682509d0761 SHA-1: e4c7702e3de1a95c32692db7875c4234aeffa483 SHA-256: d0756b951438b15b266a17063af5c6632b10eeb0e97fdf9db3192cd1448dce18
146 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 by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were extracted, the presence of numerous external URLs, many on disposable domains, suggests the document acts as a lure to external malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/123?utm_term=laundromat+for+sale+nj+craigslist PDF link annotation
    • http://lnstagram-copyright-confirms.com/monica_robinson_naacp_interview_transcript0sf0o.pdfIn PDF document text
    • http://bbflowers.net/solerosazufxz9h9.pdfIn PDF document text
    • http://dietnatur.fun/rick_and_morty_game_recipesqbv0b.pdfIn PDF document text
    • http://copyright-help-center.com/3322051955w9l7.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/badrinath_movie_songs_free_naasongs5ha86.pdfIn PDF document text
    • http://socialwave.me/36191023428i5xz8.pdfIn PDF document text
    • http://gamedv.design/ben_10_cartoon_tinyjuke._netjdgu0.pdfIn PDF document text
    • http://tryne.xyz/glo_bus_simulation_quiz_1_answers_2030ko6.pdfIn PDF document text
    • http://gidpopiteru.com/5526207844076f2p.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/womemekefawitojinel.pdfIn PDF document text
    • http://frankiearvelo.com/77024020338rp4jf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5fdbeaf38efe3.pdfIn PDF document text
    • http://doweryklkq.space/vaxejphpl0.pdfIn PDF document text
    • http://gamedv.design/35237488741jpe9q.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/banula/assessment_and_evaluation_in_higher_education.pdfIn PDF document text
    • http://tinanatibora.rf.gd/lobenogifiziwiba.pdfIn PDF document text
    • http://jefelaxe.epizy.com/odometer_reset_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001111c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111C 5360 bytes
SHA-256: 5a5c0b858ebb7952d1e5050d166f1ea2b420744d3c089098084559aafa9b894c
font_01_sfnt_off0001234a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234A 12108 bytes
SHA-256: 0dabf867b4bb075201cd8cd735a79e8274b37716519ead46d8e0bcd0f3277bff

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