Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a778e64b2c440b…

MALICIOUS

PDF

80.7 KB Created: 2021-03-11 03:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0941a8ada53454b890adf8f2f0b78805 SHA-1: 9ff383750694e45b5a25d2a9fa7ced7bc36a7836 SHA-256: a9a778e64b2c440b65b92871078064378ed20ba83d3f16390bc4bbec007e662d
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure, indicating a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were explicitly extracted, the nature of the link farm and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=tamilrockers+2019+aruvam+tamil+movie In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_601d2b026fe62.pdfIn PDF document text
    • https://cdn.sqhk.co/fugapaloter/dgidicv/shake_shack_menu_dallas.pdfIn PDF document text
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/gubulonefu.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/jadawolofuxowasisu.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/xitawujojexezopet.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/nipolibokonukowuvu.pdfIn PDF document text
    • http://fortysgjdk.fun/codycross_answers_group_121_puzzle_47909u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_60292b9087bc5.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/jatugosugavozekuje.pdfIn PDF document text
    • http://malespw.xyz/137177673961suem.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/NgeghX0/national_geographic_membership_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/wogibijulitosavapikujemu.pdfIn PDF document text
    • http://dorightschool.com/46897615386kz4gm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_602e9f2b44ffa.pdfIn PDF document text
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/7401459.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/WNgehat/4320654478.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_60025abb7a907.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/i2JjaDD/adventure_capitalist_hack_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/architecture_floor_plan_app_apk.pdfIn PDF document text
    • http://madewithsunshine.com/kim_kardashian_game_download5enr6.pdfIn PDF document text
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/pudokazave_taliwagobade_wetixaj_nazafomipon.pdfIn PDF document text
    • http://lovechat24.club/angelcare_mini_bath_support_reviewdohbh.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/mitaxipozebafewudeji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_aabba77dce7c4749b17ba68a05e407fe.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_f1bd060281894df5bcb67ebbf09f22cd.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_93225444961d41e38bb46fc6cbfe5590.pdf?index=trueIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_9f11f752e98d423a8e7e70b29bb81669.pdf?index=trueIn 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_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 5500 bytes
SHA-256: 37ac9c5ad932bcde6c1d1eeb37a7580ffa874b998c5bb9967dfe64cb83ea3a0c
font_01_sfnt_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 1936 bytes
SHA-256: 73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
font_02_sfnt_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 10952 bytes
SHA-256: bb0d45cb362c5bf85ae6f048c95ec44ef1890c28bc67bc82af6b10d373e9257c