Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8c6c20930ff70d…

MALICIOUS

PDF

81.4 KB Created: 2021-03-22 18:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0004e1e3e10e32068f1686a518ec84ef SHA-1: a77b6afec6da02f05dd716466056223919af625c SHA-256: 6c8c6c20930ff70d87c74db11eb3b80cb7db1080d92eeabc1712e8b8d2fe59ba
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, likely involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/award?keyword=caissons+go+rolling+along+pdf PDF link annotation
    • https://cdn.sqhk.co/xemugugafot/hgELgiX/jikoponu.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/case_study_method.pdfIn PDF document text
    • http://antileqphh.site/1098233806lhby7.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/jjfihgj/57937728105.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/0f7a23f6193c.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/muwepuxikakumajujikag.pdfIn PDF document text
    • https://cdn.sqhk.co/wusirilunoko/ididigs/rigujozapidopivororu.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/keboxem.pdfIn PDF document text
    • http://nopezimugabotik.mygamesonline.org/butozasoxatinuberelovabo.pdfIn PDF document text
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/xodezugerasenef-pavinutivel.pdfIn PDF document text
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/9a1c81cce70d7.pdfIn PDF document text
    • https://regisaralox.weebly.com/uploads/1/3/2/6/132681556/f2481dbc349054.pdfIn PDF document text
    • http://liketsven.xyz/what_is_the_bengali_meaning_of_communication_skillsdenut.pdfIn PDF document text
    • https://bokixewabukogu.weebly.com/uploads/1/3/4/3/134341992/gujelazezamoteb-rupamusen-geset.pdfIn PDF document text
    • http://ideal-it.fun/what_does_ankle_monitor_mean4c7yy.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/5Pgchjt/68239126407.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/ca149b37fb8de4.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/306b9a1f4e9a15.pdfIn PDF document text
    • https://wibizoginoj.weebly.com/uploads/1/3/2/6/132681485/femawolibesa.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/jghgj2d/63630981073.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd7d281-2b84-4c54-b661-74cceef47f71/what_is_the_synonym_of_progressive.pdfIn PDF document text
    • http://benamow.myartsonline.com/how_to_become_a_functional_fitness_trainer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a75f8ea-09cd-40d0-b7d3-f2884bd94eba/karl_marx_the_communist_manifesto_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf740e9-8e58-4dd2-8de3-38bb9bead28a/massey_ferguson_35_front_weights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa0cd5a-d9be-49a7-bb5e-9fc8680d6c39/what_are_the_aims_of_punishment_in_the_uk.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_off0000fef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF4 5112 bytes
SHA-256: 6a2720ca0c6b60ebdb1335ebcbecb84b2baa7adc678900a4c24505143daf6765
font_01_sfnt_off00011063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11063 11768 bytes
SHA-256: 5f9c2ccf39811ecd83c9a9b025b198c03b87dca19100a881a17d5a10d22252a0