Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2968c781b27ec4…

MALICIOUS

PDF

96.5 KB Created: 2021-05-22 02:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fdd69b4f1e0b916c7ce8122ee9afba62 SHA-1: 70c79360ba021cbc3ba5938f903656d087069980 SHA-256: 0f2968c781b27ec44c94bafaa4d3fb62b5f268063fa60ab1a8d962a812906192
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://midufefew.ru/strik?utm_term=why+do+accountants+use+worksheets PDF link annotation
    • https://dufurewamefo.weebly.com/uploads/1/3/4/5/134595550/9078399.pdfIn PDF document text
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/b875df150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_5fd8b05e6736b.pdfIn PDF document text
    • https://katifakemu.weebly.com/uploads/1/3/1/3/131381151/07beffa1.pdfIn PDF document text
    • https://gavofazipog.weebly.com/uploads/1/3/3/9/133999173/3997185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5ff1f058143a1.pdfIn PDF document text
    • https://xepesirivow.weebly.com/uploads/1/3/1/4/131408502/4790338f8e50082.pdfIn PDF document text
    • https://kipunazumalimak.weebly.com/uploads/1/3/4/7/134755782/zetugubuk_wezepefusobatoz_vokew_benixo.pdfIn PDF document text
    • https://jebupamix.weebly.com/uploads/1/3/6/0/136098333/noxuzufof.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/vivovutovarigo_maboru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_606e6fd764507.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/tatabizafubas-koganerufi-bapifepapari-tadobelafesar.pdfIn PDF document text
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/04af9.pdfIn PDF document text
    • https://xuwawimo.weebly.com/uploads/1/3/0/7/130739806/5188114.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/kigeg.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/sojoraf_nijiwanup.pdfIn PDF document text
    • https://vipopatovosidop.weebly.com/uploads/1/3/0/7/130775456/punarewis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498842/normal_6002c337b479c.pdfIn PDF document text
    • https://bubebozozuj.weebly.com/uploads/1/3/1/8/131871643/869ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_602068d27c3ab.pdfIn PDF document text
    • https://mevidumufodu.weebly.com/uploads/1/3/2/3/132303219/jewenate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 6416 bytes
SHA-256: 4257b5aed261ccb96d7b6b52587b843e34ad9d65b35b79aec213b77d78697daa
font_01_sfnt_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 5264 bytes
SHA-256: 68be3acb7ed817f54fdc74b294bf821cd8479805c03c22d80db44da887bc7ff2
font_02_sfnt_off00010d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 10600 bytes
SHA-256: 54afc73fb332001853c3963e3ef0e466b211d644025db2306f46144bbeb8fc95
font_03_sfnt_off00012fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC1 10664 bytes
SHA-256: 350bc07b60a362a34e0cb0113dd873337802867e4168a6a92d46e69b706d7e03
font_04_sfnt_off00015476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15476 16256 bytes
SHA-256: d9b6788e98d720ed34e7048aeb7a337db0b6f87b8f940ce258886e614f67cbc8
font_05_sfnt_off000169d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169D4 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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