Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0f5ef302435fec…

MALICIOUS

PDF

79.9 KB Created: 2021-03-16 21:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 417bd033be5be33280cd5e3746a4e318 SHA-1: ea8d4408bb405e3fe8c6bf2d08c2d4452f38705a SHA-256: 6f0f5ef302435fecd85f944cd6ca3b04132695ff879e0f1458e957325f4d292e
186 Risk Score

Malware Insights

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

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 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=st.+pius+x+convent+broomall+pa PDF link annotation
    • http://fadulifakibul.medianewsonline.com/65055532126.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/catholic_youth_prayer_book.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/jutakalovitaxatawaju.pdfIn PDF document text
    • http://rapegutuxipik.22web.org/jaxilifepajifukulipim.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/abundance_mentality.pdfIn PDF document text
    • http://lelonul.iblogger.org/myers_briggs_types_percentages_gender.pdfIn PDF document text
    • https://fopokefizig.weebly.com/uploads/1/3/4/5/134525302/nopisepipulujipiseji.pdfIn PDF document text
    • https://tezexitebab.weebly.com/uploads/1/3/4/6/134600353/2196090.pdfIn PDF document text
    • https://visofebofoxofub.weebly.com/uploads/1/3/0/8/130814652/ea3146a.pdfIn PDF document text
    • http://sepukolobu.sportsontheweb.net/4667364779.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5c0e4d68-ab3c-494f-a931-ddf3ab8a2e8d/pit_bike_race_cam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7134bdfc-2712-401f-b8fe-a3c64939c5db/vibawiwoxofoxuf.pdfIn PDF document text
    • http://posawad.epizy.com/vivokanujet.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/11426538330.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/how_much_is_vox_premium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3179d525-9960-4f85-a62f-625b65ccaed4/kobokotatunopudaregivexiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a87245-be1a-4144-a929-0563ab4581ee/73948484960.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/daffynition_decoder_answer_key_cc-_10.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/38614739376.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/fannie_mae_mortgage_payment_history_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f54cb6c-8853-4111-afe7-e7bbbad63a41/masterbuilt_electric_smoker_recipes_whole_chicken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220c6c84-1021-4c2f-9a07-fe0bfafde7ca/where_do_i_send_my_cdl_medical_card_in_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d50e0c9-7df7-4f72-9f0d-5582e7bf8b4f/83171747686.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 5364 bytes
SHA-256: 46776ec581e77908e564003bd296713a57447348923045fd6cdfbb131a32cfb4
font_01_sfnt_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 11164 bytes
SHA-256: f2ebef3e9b34ecf6855f4562b70932c8e80aa582d3badeaeb6eca2513d9c6bd3
font_02_sfnt_off00012435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361