Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff898d94a3c1da24…

MALICIOUS

PDF

72.5 KB Created: 2021-06-11 05:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8f2eb1728f9286646e1046f6252b5c54 SHA-1: 95651a96b71eb84b9e489a54a71996d147df4022 SHA-256: ff898d94a3c1da247c1726403c62d6d16e9a75d4fb85210c3df7f416f7fc40d4
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable hosting services and appear to be part of a link farm. The primary lure is a "garena free fire hack version download" which is likely a pretext to drive traffic to these malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/pbw?utm_term=garena+free+fire+hack+version+download PDF link annotation
    • https://xowivana.weebly.com/uploads/1/3/0/8/130813667/kiferoz.pdfIn PDF document text
    • https://mafukizagodixep.weebly.com/uploads/1/3/4/5/134525221/kowuwuzujo.pdfIn PDF document text
    • https://pisaxegeb.weebly.com/uploads/1/3/0/7/130775455/bf0eb5.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/kusirixoki-xurex-nawit.pdfIn PDF document text
    • https://jabizujosewej.weebly.com/uploads/1/3/4/5/134584717/4df4b24f.pdfIn PDF document text
    • https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/7a95dd.pdfIn PDF document text
    • https://pejuloxekipural.weebly.com/uploads/1/3/4/4/134403187/gavuvafewivajuzal.pdfIn PDF document text
    • https://tuzuratodaf.weebly.com/uploads/1/3/0/7/130738639/7176329.pdfIn PDF document text
    • https://vewewiganivobob.weebly.com/uploads/1/3/4/8/134852084/5267671.pdfIn PDF document text
    • https://radokixudex.weebly.com/uploads/1/3/5/3/135342076/paneno_kogunavenepexu.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/2349565.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutopar.pbworks.com/f/mods_for_minecraft_pe_furniture.pdfIn PDF document text
    • http://gitizuxob.pbworks.com/f/celebrity_voice_changer_free_ios.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/w/file/fetch/144451896/ribafebis.pdfIn PDF document text
    • http://lipadune.pbworks.com/w/file/fetch/144414870/what_is_the_correct_order_to_see_marvel_movies.pdfIn PDF document text
    • http://jetubabup.pbworks.com/f/3292449113.pdfIn PDF document text
    • http://biselafibe.pbworks.com/f/jiveligukokazetudasito.pdfIn PDF document text
    • http://xumamiz.pbworks.com/f/plan_municipal_de_desarrollo_urbano_la_paz_estado_de_mexico.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/f/best_percussion_massager_under_100.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418245/long_vowel_worksheets_for_first_grade.pdfIn PDF document text
    • http://nipekari.pbworks.com/w/file/fetch/144603624/awesome_screenshot_capture_free_download.pdfIn PDF document text
    • http://wojoxevom.pbworks.com/w/file/fetch/144778914/hulu_live_tv_review.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_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 5356 bytes
SHA-256: 29bda934053614780a4be153495389a7c99dbff9b666057d921c58e86f0f37cd
font_01_sfnt_off0000f12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 10288 bytes
SHA-256: f3076464cd55d93041d8105efe912c1fb584094f0be791b46cbf732f7cc93512