Malicious PDF — malware analysis report

Static analysis result for SHA-256 9314c26fb4d07461…

MALICIOUS

PDF

119.4 KB Created: 2021-04-16 12:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: af1934dfa1230b6d36e1231014ef2939 SHA-1: 721b273e5e9e109d57e9e5f016df6811691e9092 SHA-256: 9314c26fb4d07461ce921474aeee03732fe94ea9aa9c86218ac46e891226c286
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, many of which are likely part of a link farm. One of the primary external URIs, 'https://ponafet.ru/strik?utm_term=ph+food+chart+pdf+in+telugu', suggests a phishing or malicious content lure. The presence of numerous PDF links, some pointing to benign content and others to unknown domains, indicates a broad attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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=ph+food+chart+pdf+in+telugu PDF link annotation
    • http://masevetito.22web.org/campbell_biology_9th_edition_chapter_1.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/vagubezuborajixene.pdfIn PDF document text
    • http://dusipoweg.mywebcommunity.org/24911346008.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/keraruvuzatekuka.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/71290526840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tapelu/68312400060.pdfIn PDF document text
    • http://bixoravu.epizy.com/arduino_coding_learn.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/35504387692.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/ipsec_authentication_header_format.pdfIn PDF document text
    • http://kekosasokab.epizy.com/diniposulaguda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7d6c48-b634-4f24-a2b0-ba0aa076e64e/kitchenaid_stove_top_customer_service.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/weber_bbq_replacement_grates.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_102b167e368f4e3b962f858f73a7a9af.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46139ea4-8660-4e8b-8694-3b6d6d670f7e/advanced_oracle_sql_tutorial_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/xaxatedukitodazavoninik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5034df8-0e3f-4519-a051-bab3a559bfba/the_magus_bride_ruth.pdfIn PDF document text
    • http://ravuxisopol.rf.gd/video_di_uc_browser_android.pdfIn PDF document text
    • https://d64d5b41-a66a-4b78-b87f-0feaf8e9cf76.filesusr.com/ugd/cf1aed_8f5b3be42fd04ad888d7e7776b544b04.pdf?index=trueIn PDF document text
    • http://sutekotuluzuwed.rf.gd/dnd_5e_best_classes_for_each_race.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807131d0-ec99-44e0-9525-6e3ab72b4864/83185218723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c2ba19-a4bb-46fc-b7e3-acd13c0e920d/what_is_root_cause_analysis.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_831ddfb4391c4c32a441aa7134c74b64.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/faaee242-9b85-462a-8ead-d0c49ccc5cfe/pharmacology_book_for_bsc_nursing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad5589f-286e-4e9a-b6f1-941ff736f4d2/why_wont_my_snowblower_move.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_off000196f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196F9 5240 bytes
SHA-256: 4287dfdaa09896735071d1de88f99362232607f309448fd4b93af1c824dd450b
font_01_sfnt_off0001a8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8CC 11948 bytes
SHA-256: b17005a57c56bbf182334172ad0e0a1940b4e05cd45f43802634402947fb612a