Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd68a4c0d75c651…

MALICIOUS

PDF

97.4 KB Created: 2021-04-05 03:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0f4dc02c5dfe5f85fb40f5d9a6fa440 SHA-1: d914ff27e7489d418dcf6e850c4f9679376fb310 SHA-256: 5cd68a4c0d75c651e50b884aa94897b8bc4847bcc870d2c91822ab695be4c937
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with the latter specifically flagging it as 'Pdf.Phishing.Trojan'. An external URI pointing to 'nipisod.ru' was extracted, which is highly suspicious given the phishing classification. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, potentially to mask malicious links or content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=tipos+de+biocombustiveis+pdf
    • https://cdn-cms.f-static.net/uploads/4480884/normal_601305013fcff.pdf
    • https://static.s123-cdn-static.com/uploads/4417986/normal_5fe350e391695.pdf
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5fcbb7efe846b.pdf
    • http://sodalabs.club/bisegijabobale22mmm.pdf
    • https://cdn-cms.f-static.net/uploads/4482206/normal_6061ae6e2f0f1.pdf
    • http://getbuiss.online/62170750537nf7ee.pdf
    • https://cdn-cms.f-static.net/uploads/4472783/normal_604f2e0eb5047.pdf
    • https://cdn-cms.f-static.net/uploads/4382192/normal_60354352e3085.pdf
    • http://olimp-home.com/vudexowatibezexasewosipuxtyx6o.pdf
    • https://cdn-cms.f-static.net/uploads/4500878/normal_606a2d33041a7.pdf
    • http://redpandarecycling.com/catching_fire_free_audiobook7ihuv.pdf
    • https://cdn-cms.f-static.net/uploads/4494669/normal_601e3ac108da0.pdf
    • http://usesalon.xyz/zugeragefagexavw05h7.pdf
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/651028.pdf
    • https://cdn-cms.f-static.net/uploads/4428069/normal_6021ec2552a7f.pdf
    • https://maladekokox.weebly.com/uploads/1/3/4/7/134745457/24cbca453c05d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefiwegegagu/action_replay_max_ps2_elf_download.pdf
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_cddc2208a3504483a94779eeec72d5cd.pdf?index=true
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_6f5db126c53f4c3283c9c7283d0ba1e1.pdf?index=true
    • https://s3.amazonaws.com/metakibeme/41753433479.pdf
    • https://s3.amazonaws.com/vaxebisapesi/90807757621.pdf
    • https://s3.amazonaws.com/dosipive/electrical_drawing_software_open_source.pdf
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_85d32661702f41fa97b818f71a523d25.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_off000140ed.bin
6af88881a3ce8fb1cec8775451d73f60a6670802a2922a0109660e80fb0232c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140ED 5112 bytes
font_01_sfnt_off0001524c.bin
33be25ed50c23e296aa9a932ba4a236954f83027fabb972a775c6e8d130f2fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1524C 10700 bytes

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