Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f93028fd4ec0e0…

MALICIOUS

PDF

76.0 KB Created: 2021-03-06 10:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8f5e856aa94ca87f5d18a3a0d0e223ab SHA-1: f403d4225463063752dde0c15dc4d9c9bc992729 SHA-256: f1f93028fd4ec0e0f3aabc9fc938b386910f7a4381d457537274c642f679f313
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. One prominent URL, 'https://ponafet.ru/strik?utm_term=warehouse+management+jobs+near+me', suggests a lure related to job searching. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=warehouse+management+jobs+near+me PDF link annotation
    • http://zifixoribe.scienceontheweb.net/consider_the_differential_equation_dy_dx2x-y_bc.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/how_to_change_battery_in_hicks_digital_thermometer.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/why_is_my_internet_router_flashing_red.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_1bceffc641f14f65a4494c5eeeeb3a86.pdf?index=trueIn PDF document text
    • https://a2d2c786-a255-4d30-aaac-3df02bc54f47.filesusr.com/ugd/c345b0_f8479509abf044dfb8e619fcd668d89c.pdf?index=trueIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_7390fefbf57c42c9b95d21cb8efd71d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8733d7-bf43-40c2-abd0-1bebe09660d5/what_should_i_name_my_lip_gloss_company.pdfIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_d41ca94458e94b4cae64613bcbf2ea19.pdf?index=trueIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_f9e40fb12f3640bcacf0a6f5893140b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbed6aa-8f73-4f68-a622-839d79721a75/nebefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b329156-80f3-4a8e-a173-9965c7a81b5b/70895164859.pdfIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_1c42c0b312474c6b946f8aacdfebad01.pdf?index=trueIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_5f4294270545480187110975b187c0f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b739cfd4-50a7-4f77-85dd-c07b8818a459/batuwofefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7339da8b-a80b-49a0-9411-11a5f151d142/27369986837.pdfIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_56018179ff0e46249c68fbba3bfda69c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c201cfe-af45-4911-87d7-ad73ce881e6d/rascal_850_mobility_scooter_review.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_370f94ba190e495eaca8bc4ac6c98224.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28dae97-6a46-4a40-b638-92d6c52204e0/how_to_make_a_hydraulic_tube_bender.pdfIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_54389d4a860e4b6bb64dfd0c9034c5ef.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_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5296 bytes
SHA-256: 58909dfd4b02b586047d08dd7c17dd814e21bcf97493b7546ce4c5441a799522
font_01_sfnt_off0000ffb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB7 10316 bytes
SHA-256: 517c56db9ebd158cae88dce6d09d65c53831434b34535841446970ac37c60fd8

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