Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a295041568f00c9…

MALICIOUS

PDF

92.7 KB Created: 2021-03-06 19:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 513a70f7cdbd20134f20aad860a00be0 SHA-1: 1ea909bdfee5d4e6cc91a6d5b9de519c66261855 SHA-256: 9a295041568f00c92d342149ddaece787351afbff6304f3fab1498fb97d13823
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 and link farms, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to product reviews, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=fostex+mr-8+mk2+reviews PDF link annotation
    • http://barajofa.mywebcommunity.org/does_fender_fuse_still_work.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidatoxo/hcjjijO/ultimate_omega_coq10_fiyat.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/how_to_use_spirit_items_smash_bros.pdfIn PDF document text
    • https://nakabupibuf.weebly.com/uploads/1/3/4/6/134608610/4e50a36df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_601f780819f10.pdfIn PDF document text
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/midepagulupaxaliwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_6025141619c84.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/dyig2ib/flip_dunk_gameplay.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/moxafakom.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/3gfhh1N/dominos_order_online_50_off.pdfIn PDF document text
    • https://geguxawuxereko.weebly.com/uploads/1/3/1/3/131379712/40c52cf1.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/mikumezuwuli_lorovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423189/normal_603568c19b00a.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/fawibupomiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460066/normal_600ecdbf2452f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5ff8a3b89e3a3.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/K5Fjfib/84856855615.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/ab890de1-dcf2-432b-9a16-42198b639f43/30872731509.pdfIn PDF document text
    • http://disoluje.myartsonline.com/rajoborufurotuzibive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e66697ad-6e53-4f39-a3f7-3bbcfefe7333/fodadedebafumabekuvatasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c0109e-bcf9-47d9-9757-caef60d18c11/regefutufemaze.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_5938cc30a69945a9acf23a5e03cb26ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f57321d-fff8-4547-8a68-72bfa3f9a945/mean_median_mode_range_word_problems_worksheet.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_3b9be7a468f84084aaf5bc2c085a1d7e.pdf?index=trueIn 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_off00012d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D87 5188 bytes
SHA-256: 36cec507faac042d5eefd18c4c411393667f96329eb6ea1e0187b863e3c7ac79
font_01_sfnt_off00013f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3F 11264 bytes
SHA-256: 37892716f8c930b2f83cb108a00ec754d0d65d10ce02f68cc6cef8c54952a2ac