Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7c60447e29ef23…

MALICIOUS

PDF

82.6 KB Created: 2021-04-05 10:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aa5f740a61f6dd575591d8c89859dba6 SHA-1: 843d2374f2867dd4be895823900e03695193a3f4 SHA-256: ae7c60447e29ef23f3bf3803a5a48c519d3ec2e7202a5313864336c217725b9d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to external sites that appear to host game modification tools or other potentially unwanted software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://zajinet.ru/123?utm_term=boom+beach+mod+hack+apk+2019 PDF link annotation
    • http://shimano-stradic.ru/railroad_tycoon_3_economic_modelky4kw.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/icDhhKa/fovefofelulawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_5fd7c0ce08998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376088/normal_6000bc95c55a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fe196b221492.pdfIn PDF document text
    • http://shop-kid-toys.online/ielts_all_speaking_topics_and_sample_answerspefd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_6068f3708a061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369331/normal_600119676a542.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/hhBhjgi/55169431459.pdfIn PDF document text
    • http://ek-arenda.ru/waneruwk62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_60691c16e7885.pdfIn PDF document text
    • https://cdn.sqhk.co/janogoxuke/VhbP8gj/kulogikoroxokufapon.pdfIn PDF document text
    • http://magazinrf.xyz/youtube_blackpink_ice_cream_zepeto0oemq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_600e438c4f911.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/igfiayz/fuxutidosusukexi.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/jahjcjb/fivinigoninefokireko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fe8d4fda-8498-458c-915f-fcb73f734847/song_of_ice_and_fire_main_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe916e2-a2c1-4071-898b-a10e4cd01aab/buying_a_new_car_checklist_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ba16df-57a1-44d6-b6fc-9b9a2db5ead2/how_do_you_use_a_precision_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fe4c99-8cdf-4760-b887-bcad897ad614/nicomachean_ethics_book_10_chapter_8.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/69411459119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275f127b-48a0-4a15-b0c5-98be11cbbd78/how_to_light_up_a_furnace_in_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/29661440620.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84D 5296 bytes
SHA-256: 5bea3be7d71248aa739dafe3a83dd1c3ea995689da1a3066ba3c884bfad55422
font_01_sfnt_off00010a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A46 10744 bytes
SHA-256: b35a1403c3b96bf69fcb2666a89b95b19332526fcbc832b9d0946d99214b6353
font_02_sfnt_off00012ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378