Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e07fb6857d8fa0…

MALICIOUS

PDF

72.0 KB Created: 2021-02-21 06:22:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 051dc99502080f18a295a4a280863304 SHA-1: 507e19c167d7bf48ee9daf73d7605f8f84e83a3f SHA-256: 14e07fb6857d8fa086c13ee27582fa783d9432bc96cf31fdbdbf27065171d556
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document's structure and embedded links suggest it is designed to trick users into visiting malicious websites or downloading further payloads, masquerading as legitimate documentation. No scripts were extracted, but the presence of multiple suspicious URLs indicates a phishing or malware distribution attempt.

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://druttle.ru/123?utm_term=microsoft+sql+server+management+studio+documentation+pdf PDF link annotation
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/c2ce5cc64196.pdfIn PDF document text
    • http://meinekarten.best/15047588586jeyfe.pdfIn PDF document text
    • http://cenderaoriginator.com/tinavawomo0npvf.pdfIn PDF document text
    • https://vejiledulibona.weebly.com/uploads/1/3/4/3/134318828/d657a.pdfIn PDF document text
    • http://purpless.vip/9089658928pjk0p.pdfIn PDF document text
    • http://rfs.team/touch_the_wall_missy_franklin_full_movietwqds.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393755/normal_5fe435bfe2125.pdfIn PDF document text
    • http://goldenframecollision.com/boston_market_chicken_soup_caloriesaou0r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413019/normal_5ff08ad1e9cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6019c52db9d07.pdfIn PDF document text
    • http://detomebokiv.iblogger.org/gerudo_valley_piano_sheet_music.pdfIn PDF document text
    • http://tersq.fun/zedofulovuzagijexu8s5a5.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/aims_and_objectives_of_islamic_educationhwahf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_600af0c413fc6.pdfIn PDF document text
    • http://aduo5.online/angular_template_form_validation_examplewvbza.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/jivedetosuremizesiku.pdfIn PDF document text
    • http://opsnatur.fun/nuance_professional_converterii6j8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujotuxubegu.rf.gd/ipad_mini_5th_generation_size_comparison.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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 5668 bytes
SHA-256: 87df59048c23359cdb1b5e3c8378b23b0ad8263a2403ed4fb5ef43a1abdd2dc0
font_01_sfnt_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 10440 bytes
SHA-256: 2031112fe9c15e8a8ad9a7520e45191ac6b7f50c4e97670abeb3a6e69b94c461

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