Malicious PDF — malware analysis report

Static analysis result for SHA-256 6379c2cd91e0083b…

MALICIOUS

PDF

78.0 KB Created: 2021-02-16 07:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b178f958988ed906ca0eb586f86818d2 SHA-1: c1c1185cf0b8232006283e5d4fa1df6bd2fb7325 SHA-256: 6379c2cd91e0083b2fbf720a43952db582bcb936ce824bfd5783d9d68d665a46
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs, many of which point to disposable hosting services and appear to be part of a link farm designed to redirect users. The presence of these links suggests the primary goal is to direct users to malicious websites, likely for phishing or further malware delivery.

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://crophysi.ru/strik?utm_term=doll%2527s+house+part+2+pdf PDF link annotation
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/c22da80d5ae57aa.pdfIn PDF document text
    • https://xinuxarovota.weebly.com/uploads/1/3/0/7/130776268/02a827ea56dc.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/diiGJbc/tokyo_drift_3d_street_racing_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/ichvNhe/espn_plus_ufc_fights.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/id7mAhd/pepabaliredetevede.pdfIn PDF document text
    • https://visumosibe.weebly.com/uploads/1/3/0/8/130814065/dopetudewexel_munajor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427523/normal_600244b3bb96a.pdfIn PDF document text
    • https://gukulijavezo.weebly.com/uploads/1/3/4/7/134714581/wemozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_5fcf7309e98bc.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/77962beb8b27.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/cvuijhi/73547200786.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegudonokor.epizy.com/52756872431.pdfIn PDF document text
    • http://mikusadetov.rf.gd/44535693036.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/azhage_azhage_video_song_starmusiq.pdfIn PDF document text
    • http://jezawirigi.epizy.com/69975800093.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/bhaiya_tamil_movie_audio_songs.pdfIn PDF document text
    • http://vuloroluget.rf.gd/listening_practice_test_2019_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/45132389058.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_off0000ea79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA79 5296 bytes
SHA-256: ecc2e5a4a4de50dcd43e1908fc2bacd584c7e5b1fbee48315f5d09d41a162d95
font_01_sfnt_off0000fc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7F 14664 bytes
SHA-256: 18a33d1bf6ef215baeba417bb94310dd47a30f8e7b8a5775e3dbcfdf99b5a151

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