Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c8cb77f3ba8c4f…

MALICIOUS

PDF

74.5 KB Created: 2021-03-15 11:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b40338a22c25529b623c86fa577f0069 SHA-1: 983e6eae9aff483483f21a29574c58d8c8078616 SHA-256: 72c8cb77f3ba8c4f5c4e56b2ddb798880012b34d51dd44ba3edd1843acb513c4
156 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 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://zajinet.ru/strik?utm_term=david+eddings+pawn+of+prophecy+ebook PDF link annotation
    • http://revilokepudidu.mygamesonline.org/duxutapizagasif.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/five-minute_mysteries_collection.pdfIn PDF document text
    • http://zuvabefip.22web.org/how_to_remove_grease_from_microwave_filter.pdfIn PDF document text
    • http://wofirulufe.iblogger.org/bluestacks_64_bit_windows_8._1_free.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/32612725868.pdfIn PDF document text
    • http://bofesota.66ghz.com/pros_and_cons_of_merrills_principles_of_instruction.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_b3a5a09c2b154b4e942a5e7f40a08ba3.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_27fc8b5c237445d8aa78054f610a501d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/slack_app_for_android.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_265826f4b5d2473eb85fa73123010bd1.pdf?index=trueIn PDF document text
    • http://wuwedilejom.myartsonline.com/pd_sharma_ecology_and_environment_download.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_2396093067a0493682b15bc4588aa5e9.pdf?index=trueIn PDF document text
    • http://fikamax.epizy.com/gagekabafogazupojivulo.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_06297a6cfb064d779d24b5c2bf82dacd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawe/zopemajadolon.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/bhojpuri_film_nirahua_hindustani.pdfIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_8d5af5b9f44848e791bef5f747948538.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kukazowox/video_show_pro_pc.pdfIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_0aa6dd00cfed40e08816999302cda41a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/penale/acrobat_reader_windows_10.pdfIn PDF document text
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_5d1993b15e464eaeac304734d60f82ea.pdf?index=trueIn PDF document text
    • http://tuxefunuzire.atwebpages.com/bivuf.pdfIn PDF document text
    • http://dijovoxokad.rf.gd/how_to_clean_my_intex_hot_tub_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/equivalent_fractions_decimals_and_percents_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/72093701359.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 5844 bytes
SHA-256: b7a3c6598c0a108fb8dd643f427ce9790a320ebb3e1660aa46776bef6dcd4149
font_01_sfnt_off0000f4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 11692 bytes
SHA-256: cfb2a11a466d681e5cbbaca6b82ff1dcc393a077961c2f15028daaa158442fff

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