Malicious PDF — malware analysis report

Static analysis result for SHA-256 71102cc77f7227e4…

MALICIOUS

PDF

81.7 KB Created: 2021-04-10 17:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f08e4964d84b0d6477a72c08e2a0d9ea SHA-1: d8859df94b43151ca12caf5ee144de58be24363c SHA-256: 71102cc77f7227e4aba4b2dd22c931782b5585c505919ee01c59bb0497ce9c8d
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 hosting services, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to GPS devices, which is likely a pretext to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/strik?utm_term=garmin+62s+vs+62sc
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/rifedonavot.pdf
    • https://zuxobopabure.weebly.com/uploads/1/3/4/3/134344154/174602.pdf
    • https://cdn-cms.f-static.net/uploads/4428335/normal_6027809b42318.pdf
    • http://pazifelurup.medianewsonline.com/boy_scout_book_2020.pdf
    • https://cdn.sqhk.co/wavefekus/jgciarb/26180138586.pdf
    • https://cdn-cms.f-static.net/uploads/4481291/normal_606c9b93846d7.pdf
    • https://cdn.sqhk.co/rowojazur/0YMDa01/cityjump_varde_abningstider.pdf
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/2833fce670b0.pdf
    • https://cdn.sqhk.co/rojisixel/5Lxjfgg/jufevevej.pdf
    • http://sipataj.sportsontheweb.net/learn_wing_chun_techniques.pdf
    • http://judupebe.getenjoyment.net/47469715955.pdf
    • https://cdn-cms.f-static.net/uploads/4393029/normal_602c9429ebc1b.pdf
    • https://cdn-cms.f-static.net/uploads/4417827/normal_6058e0f99bfa6.pdf
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/fagugafati.pdf
    • https://zokamufonokori.weebly.com/uploads/1/3/1/1/131164159/zumusotuvov_dadunafevixujaj_verem_mokiv.pdf
    • https://cdn.sqhk.co/zifeduwa/f9geghc/37247342142.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://padusij.onlinewebshop.net/glimpses_of_world_history_bangla.pdf
    • https://uploads.strikinglycdn.com/files/1800fb8b-aaad-475b-be9d-9f5bafc26976/oracle_database_sql_certified_expert_certification_price.pdf
    • http://witesenigo.atwebpages.com/6135819800.pdf
    • http://bopiguxa.atwebpages.com/all_in_one_guide_for_class_10_science.pdf
    • https://uploads.strikinglycdn.com/files/9849ef3d-5d54-4845-a2e7-a26c64b1da4a/xofupobukoni.pdf
    • http://zobuwijezad.onlinewebshop.net/97778469147.pdf
    • http://baletax.onlinewebshop.net/how_to_use_amazon_echo_speakers_and_alexa_as_intercoms.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_off0000f5c4.bin
c250ec05a915a4e310aec7b4ddb1b5bc1db434b96707b4d5179215b2ec8e0c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 4768 bytes
font_01_sfnt_off000105cc.bin
9e2935d1245ef03efd74f2fce736e5f9e0201ee0b184cb9531bf846c7423fbe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105CC 11084 bytes
font_02_sfnt_off00012b8c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8C 4324 bytes

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