Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c7d87ec2621257…

MALICIOUS

PDF

93.0 KB Created: 2021-05-22 20:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 403c0f474f9b1386fc0972c11d091898 SHA-1: 9d3ed8c398f934454615bd3dfb18ac8fa556fcc5 SHA-256: f2c7d87ec262125760a788301a722f5698e93fe45b143834b962e15bdfa3228a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://pelibifir.ru/strik?utm_term=old+assamese+film+video+song+download', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text suggesting a lure for downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=old+assamese+film+video+song+download
    • https://cdn-cms.f-static.net/uploads/4456393/normal_6033fd9df042c.pdf
    • https://cdn-cms.f-static.net/uploads/4497110/normal_6060ddaf5995f.pdf
    • https://cdn-cms.f-static.net/uploads/4381536/normal_60462c209a0bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nefagolom/lotupuwarafegemoterebom.pdf
    • https://s3.amazonaws.com/timeziso/what_does_assessment_drives_instruction_mean.pdf
    • https://uploads.strikinglycdn.com/files/798fcab5-7b4f-488d-8aa4-0b67c696ef15/where_are_navy_bases.pdf
    • https://uploads.strikinglycdn.com/files/25f82f18-4033-4a89-b7f4-fcd684db12a4/washington_dc_news_cast.pdf
    • https://s3.amazonaws.com/tajimipojimo/19812006951.pdf
    • https://uploads.strikinglycdn.com/files/3a7e6ada-fec8-48e0-b45d-b861cc8b0918/37072824117.pdf
    • https://uploads.strikinglycdn.com/files/5a871390-ff51-4c6f-8fe1-aa101ed87d50/what_kind_of_oil_goes_in_2007_chevy_impala.pdf
    • https://s3.amazonaws.com/kifutizijebuj/bubble_game_uptodown.pdf
    • https://uploads.strikinglycdn.com/files/42c4a467-5cb8-4e2d-9756-08ad258af182/38565295057.pdf
    • https://uploads.strikinglycdn.com/files/14a1a3e3-4a1b-411e-ae85-d4886fd9dbef/10167280035.pdf
    • https://uploads.strikinglycdn.com/files/217e5e1b-b13e-4f54-b4ff-6f55e8625796/violin_bowing_exercises.pdf
    • https://uploads.strikinglycdn.com/files/c6053aac-b15e-463a-9f5a-ec3b91f6bd58/7.3_transmission_fluid_change.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/59937699291.pdf
    • https://s3.amazonaws.com/vipinib/folasinegik.pdf
    • https://uploads.strikinglycdn.com/files/90edc734-1bdf-435b-9c3f-e75fe2ad0632/8082711844.pdf
    • https://uploads.strikinglycdn.com/files/bfeba071-9f48-4c07-b749-2f4e8e215418/americas_book_of_secrets_season_1.pdf
    • https://s3.amazonaws.com/vuzufexarevima/ielts_speaking_part_2_2019.pdf
    • https://uploads.strikinglycdn.com/files/171818a0-1a06-4abb-88e1-b5213edc798b/297761885.pdf
    • https://uploads.strikinglycdn.com/files/b9d8aa5e-e18e-44e8-996d-20457551311c/boruduponadenebufur.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013147.bin
945e6cbe9888453f8b467f760a4253d7b196cba69bb4566c44a13aefdb75b0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 5308 bytes
font_01_sfnt_off0001435e.bin
04ff5d8df07a737f6a0f1957214d4f851c00cea31562ee6ac320e8d641b20bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1435E 10528 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.