Malicious PDF — malware analysis report

Static analysis result for SHA-256 1070dd9c67d9d421…

MALICIOUS

PDF

76.7 KB Created: 2021-02-28 07:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d3f9d232c083efc8137137b4059a3383 SHA-1: 20ce6c97d3c1a5988edeac571f14b3d9f0dd8607 SHA-256: 1070dd9c67d9d421982131cf3c238813b0c14b9a4d68fb40fc885797fab37e6f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing sites or download further malware. The document body, though heavily obfuscated, appears to be a lure related to product manuals.

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://jacksth.ru/award?keyword=samsung+bd-j5100+blu-ray+player+manual PDF link annotation
    • http://thefortykuti.com/66568737658ljn5v.pdfIn PDF document text
    • http://lenudes.com/nexuzezomosajulubupagekole8l9.pdfIn PDF document text
    • http://insurancesouk.com/dr_morepen_glucometer_manualxfa2j.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/zelavexakag.pdfIn PDF document text
    • http://trylait.pro/bamubavefaduwsy78.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/zerusuretobugug.pdfIn PDF document text
    • http://noxesim.iblogger.org/zapaxoz.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/68370979508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_60373742d0dd1.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/xufeva.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/95099423156.pdfIn PDF document text
    • http://creditactive.info/dipabifujilowuzfecxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejoruxebesinem.rf.gd/4554873751.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/47068000469.pdfIn PDF document text
    • http://vonizevugopu.rf.gd/badrinath_ki_dulhania_full_movie_filmyhit.pdfIn PDF document text
    • http://fididebezewigex.epizy.com/14314474557.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/psalm_23_rod_and_staff_meaning.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/nothing_can_change_the_shape_of_things_to_come_movie.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

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_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 6048 bytes
SHA-256: 802f6d04920b8376c15d414833b2594487a0f5ccd384c40ab645fed8199b7c68
font_01_sfnt_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 10368 bytes
SHA-256: da6aac76c021bd86a9e5095640b4132cfd863181ed43586853302f3e39463398

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