Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c1672e8afb6e98…

MALICIOUS

PDF

102.8 KB Created: 2021-05-15 20:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c934fed443e7254c1ba4e0ad6c01730 SHA-1: 9a29b51030d5ba336d8e31504afc1b199ade57a6 SHA-256: e9c1672e8afb6e980b025e5f0633c445f6bbfaeaa3191e31178bd0bc3eb16343
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://fokemale.ru/strik?utm_term=where+are+cyberpower+ups+made
    • http://setokanekema.mygamesonline.org/tuvemibuwajagoburopok.pdf
    • https://tedemikof.weebly.com/uploads/1/3/4/5/134593475/e4b2e46be6191a.pdf
    • https://cdn.sqhk.co/fipuwemupe/bjd4pgh/benefits_of_reciting_surah_ash_shams.pdf
    • http://lizoguxumugef.mywebcommunity.org/lesson_9.2_practice_b_geometry_answers_pages_535-541.pdf
    • http://ganitigusawev.mygamesonline.org/causes_of_ethnic_conflict.pdf
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/1efa6c.pdf
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/19ce12238e7b90c.pdf
    • http://rulajamizap.getenjoyment.net/public_relations_strategies.pdf
    • http://romakipojaxu.mygamesonline.org/81309910078.pdf
    • https://cdn.sqhk.co/zudipoje/gghaiaG/skulduggery_definition_in_literature.pdf
    • https://wutarodopa.weebly.com/uploads/1/3/4/2/134266687/bugaxesutazitu.pdf
    • https://cdn.sqhk.co/xanuramalu/dhatYkv/45942612194.pdf
    • http://tonemisi.medianewsonline.com/bics_training_manual.pdf
    • http://neriwor.medianewsonline.com/penyebab_bronkopneumonia_pada_anak.pdf
    • http://vikiduxa.mywebcommunity.org/solve_simple_equations.pdf
    • https://nifatukipukixe.weebly.com/uploads/1/3/1/3/131398430/faxefetufabili.pdf
    • https://cdn.sqhk.co/jitolado/ekljbPq/interstellar_2_movie_plot.pdf
    • http://sazinoz.mypressonline.com/4928454105.pdf
    • http://xemizawufogutuf.scienceontheweb.net/80463599048.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nosigegu.onlinewebshop.net/xepovowizomar.pdf
    • https://uploads.strikinglycdn.com/files/7ca2027e-c771-4690-a963-92211012c20b/52930646555.pdf
    • http://letutemoxeluz.onlinewebshop.net/7476207548.pdf
    • https://uploads.strikinglycdn.com/files/454570a6-a56f-44e9-a99c-12633b9918ab/pidapusufisenitomamobu.pdf
    • http://najijojovigom.myartsonline.com/77195717721.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148bb.bin
c4a4aca570f0bbf92946d61e5572728facc887e9ecf22b0cd2ac78f054b18e0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148BB 5276 bytes
font_01_sfnt_off00015ab1.bin
fcc3ccddd2885dc5a09b28085fa5d29211ed2a8e61848f401f7f4a59490ae8e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB1 10828 bytes
font_02_sfnt_off00017fc7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FC7 4324 bytes

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