Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7242605409cdf2…

MALICIOUS

PDF

80.2 KB Created: 2021-04-05 06:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fe3e41eb52c6ec7aca32cbed64b1c9de SHA-1: 554cba6767d9245aa25fca080c828181e82516b5 SHA-256: dd7242605409cdf2bb896387e63bbd17a6561bead829986b061367d58e958ae9
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://xajibur.ru/123?utm_term=meeting+notes+document+template PDF link annotation
    • https://forabuluzasojar.weebly.com/uploads/1/3/5/3/135303956/livikoxesoxunej.pdfIn PDF document text
    • https://wanitovamuk.weebly.com/uploads/1/3/5/3/135303456/bixabetimowomagaluk.pdfIn PDF document text
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/c0172872d38.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/892172.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/bazakodajesalojixiside.pdfIn PDF document text
    • https://jubigugatuse.weebly.com/uploads/1/3/0/7/130775741/netunavirojatowiga.pdfIn PDF document text
    • https://tizemafuniture.weebly.com/uploads/1/3/4/6/134636649/bomenurefuxef.pdfIn PDF document text
    • https://duxotitur.weebly.com/uploads/1/3/4/5/134596147/37dab1f9615d.pdfIn PDF document text
    • https://falijufik.weebly.com/uploads/1/3/5/3/135349852/losuveditajivam.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/patabopiforakaton.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/nugopelajewosilisivuz.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/mikemopimakobepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_65f44ec3c23d4a779f8689ee802e7af3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/which_marvel_movies_to_watch_before_endgame_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/oasis_bottled_water_cooler_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/suzuki_piano_book_3_with_cd.pdfIn PDF document text
    • http://kiwixapuwijoj.rf.gd/98813348197.pdfIn PDF document text
    • http://rafoputoxuxu.epizy.com/javagoganurugovinil.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/comment_assembler_plusieurs_sur_mac.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_81c9c8e3dfee49beb058e222adcfc2d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/polijisebifubijegaxojim.pdfIn PDF document text
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_3be4ad5acf5e4f6dba14a55ffac76a08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/cannon_range_guide_osrs.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/gajuw.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_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 5304 bytes
SHA-256: 128760de9daf02082b100ee5ae95e78f2f7780aa95c96e0092ddeacd114df3ed
font_01_sfnt_off00010f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F93 10684 bytes
SHA-256: 7105669e98befd3e8755277f7b7256f9e59a52b077aed1f3bcfec0a05721acf1