Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f825460c1a0cf3a…

MALICIOUS

PDF

90.3 KB Created: 2021-04-01 14:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4bc51befa9b13ac2b1a933cafde04c2 SHA-1: 2d06021abdeda03c49191ae1a23941396cad13b1 SHA-256: 0f825460c1a0cf3abdc12202520da110da5e4c74d7b053f859481ba3b8edb0e7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a mass of external links, with one prominent URL leading to a site that appears to be a phishing lure disguised as a search result. While no scripts were directly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=god+of+war+best+summon
    • https://cdn-cms.f-static.net/uploads/4381340/normal_604db1c14e2d6.pdf
    • http://byseles.xyz/guest_speaker_certificate_templateygd68.pdf
    • https://cdn-cms.f-static.net/uploads/4369501/normal_603e9f7c7535a.pdf
    • https://cdn-cms.f-static.net/uploads/4479688/normal_603a7ef0f2392.pdf
    • https://cdn-cms.f-static.net/uploads/4378165/normal_6040e4d463932.pdf
    • http://ehaberdevlet.com/canterbury_tales_modern_english_epub922go.pdf
    • http://falutaburifa.iblogger.org/bewedafuji.pdf
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff717fa3f958.pdf
    • https://cdn-cms.f-static.net/uploads/4368770/normal_6028f30583517.pdf
    • https://cdn-cms.f-static.net/uploads/4424036/normal_60210844bfa9c.pdf
    • https://cdn-cms.f-static.net/uploads/4451355/normal_6051b06f661cd.pdf
    • https://cdn-cms.f-static.net/uploads/4455195/normal_603254707184c.pdf
    • http://rent-nout.site/nugejadln21.pdf
    • https://cdn-cms.f-static.net/uploads/4497078/normal_604042dfaf030.pdf
    • http://1xbet-regi.site/murubesorafanamijebadada0jq7x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zozuxukoxo/lds_primary_come_follow_me_talks_2020.pdf
    • http://vamafawuf.epizy.com/71926329262.pdf
    • http://dusekamalebe.rf.gd/peavey_vypyr_15_manual.pdf
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_bebac83094684406ac9b4d2931c0ba24.pdf?index=true
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_7a664c7789224b4588cdb153064724fc.pdf?index=true
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_af170e52e4d64fd38eddcb56bd1ab248.pdf?index=true
    • https://s3.amazonaws.com/kotenu/44129026119.pdf
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_765f7f7d68c74c04926e5100303808f5.pdf?index=true
    • http://vesuduw.epizy.com/lawn_boy_gold_series_2_cycle_lawn_mower_parts.pdf
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_dcfb0e8715c5457fac57bb3650550cca.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001252b.bin
6b4948431c6611a2a1d875d0e8c360b7e8d8573ccbd546aa485a5253dadabe96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1252B 5284 bytes
font_01_sfnt_off00013724.bin
4a0c0ec7c67469b0747004ce9ac18a531f6239e8555ec6c8ea5d74c30341cd62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13724 10636 bytes

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