Malicious PDF — malware analysis report

Static analysis result for SHA-256 e097b8a4bb4722f3…

MALICIOUS

PDF

79.3 KB Created: 2021-05-06 20:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: de5acc9d03b80d17631c58963708d709 SHA-1: df2e3475fcd02e44f6b1ad6f806e853872da7f0b SHA-256: e097b8a4bb4722f3314d4ef250cc7afca6ff768f481084761631b0505caa1bf7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/strik?utm_term=where+is+scroll+lock+on+logitech+wireless+keyboard PDF link annotation
    • https://cdn.sqhk.co/valujoper/kdhahaf/pubg_mobile_facebook_login_problem.pdfIn PDF document text
    • http://sizegoduxuxa.mygamesonline.org/luminowiwuxoto.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/77497248261.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/thagdjd/the_wolfpack_brothers_now_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/ggAy1wP/the_auctioneer_talks_fast_answers._com.pdfIn PDF document text
    • http://jatudoz.getenjoyment.net/proyecto_cerebro_humano.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/jZ4K7Nf/todo_cuenta_letra.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_8b66e921dba14ebdb6944ccbbd09cb08.pdf?index=trueIn PDF document text
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_1acf9899966f400dae8169fd4ee8c28a.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_d891e13908714133ae5b368c7b8f2286.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b920deca-396d-4ee5-b676-ad10804fff5a/48524973987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be8d4f6-e54e-4203-b39b-a223de99ea81/27267791745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a75119-d816-4863-b8cd-f05224337476/king_lear_movie_1998.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_1b3199e505ed4e43904a306f67053953.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bab437-cd9e-499e-959a-9fccd6479f76/examples_of_conflict_resolution_techniques_that_can_be_used_in_the_workplace.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/best_bodybuilding_motivation_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/what_is_the_next_big_interior_design_trend.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_7d175258d9f64314bc8050a2caa28c50.pdf?index=trueIn PDF document text
    • https://8e6fe9cb-6e01-49b8-a8bf-add1d7538daa.filesusr.com/ugd/4e948c_3c681362f42e4e8c8f5603d65c5ed68d.pdf?index=trueIn PDF document text
    • http://rofuvawitarul.atwebpages.com/bunevax.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/76018263024.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_f1c49000872f41338b32f46857ef9c3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/why_did_my_keurig_stop_brewing.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/vukidozizuver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fadf45ed-cfad-4f2a-b52d-23cd3cacc1c9/how_to_switch_off_ipod_nano_6th_generation.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_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 5612 bytes
SHA-256: 3635b7223f8248c02ef768de0fa886c327c5c306d303f6079a708e3740691f1a
font_01_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 11596 bytes
SHA-256: f2cd61507556460f40427678fcc639bff94bd7d9623ec62ac3ca0b61aa8e7006