Malicious PDF — malware analysis report

Static analysis result for SHA-256 360889671eaff767…

MALICIOUS

PDF

86.3 KB Created: 2021-06-07 20:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2203d9d71a5dce6a1b9346d64f45aa08 SHA-1: 6c489de7fce8438833b562dbf71d2a2e1d19e5f0 SHA-256: 360889671eaff767ae0ddf5d25d0c7365b4c87a374bfd8532301ba70f57db996
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The presence of a 'download button' lure further supports a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/pbw?utm_term=bihar+tet+previous+year+question+paper+in+hindi+pdf
    • https://ligefupoluwoka.weebly.com/uploads/1/3/4/8/134888193/3813042.pdf
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5ffdc2b3b7f5d.pdf
    • https://cdn-cms.f-static.net/uploads/4463559/normal_60be538168ba8.pdf
    • https://static.s123-cdn-static.com/uploads/4455176/normal_5fe26403e79f2.pdf
    • https://static.s123-cdn-static.com/uploads/4446924/normal_5fe3af531bcba.pdf
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5fe623127f57c.pdf
    • https://cdn-cms.f-static.net/uploads/4445881/normal_5fdb811ab1752.pdf
    • https://cdn-cms.f-static.net/uploads/4497395/normal_606b6a9ace472.pdf
    • https://cdn-cms.f-static.net/uploads/4383149/normal_603b47b0755e7.pdf
    • https://xuwowazasoko.weebly.com/uploads/1/3/4/0/134041707/1686580.pdf
    • https://cdn-cms.f-static.net/uploads/4459774/normal_601b609d2bf84.pdf
    • https://cdn-cms.f-static.net/uploads/4410016/normal_605e1c752d770.pdf
    • https://static.s123-cdn-static-d.com/uploads/4381340/normal_60b54ce11b8f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/856a2023-bc2b-4b1e-acfe-160b81668600/sumesakivame.pdf
    • http://gatunam.pbworks.com/f/jeneb.pdf
    • http://kakexigodelo.pbworks.com/w/file/fetch/144575214/minakuzefoku.pdf
    • https://uploads.strikinglycdn.com/files/8f21ac44-12b6-4c3c-aed0-ad10a357d7dc/16293915402.pdf
    • 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3df.bin
c4c060c7036f52b6f6f63ec282fc62a2084b36c7ecd1022596a30baf728730ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 5436 bytes
font_01_sfnt_off0000f65b.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 3720 bytes
font_02_sfnt_off000101be.bin
dfb222db6bdd2c6c2fe50b4ee26caa100d02ce930088ee4c50114eeb00e1a1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 10564 bytes
font_03_sfnt_off00012616.bin
767bebf1510c700761c51b8099d6e59e15c2679d1b59b49392991c671eefdb31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12616 12044 bytes

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