Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a26167c6e1b0003…

MALICIOUS

PDF

77.4 KB Created: 2021-02-14 10:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 758e65b4438149d56dcce42f988bae04 SHA-1: 97b257b3ddff12f2faf174aa20e29d098e4021bb SHA-256: 4a26167c6e1b0003c3a4d701afaa39bc633ad08a6272faab07efecaf68cc54ef
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, indicating a link farm designed to manipulate search engine results or direct users to potentially harmful content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=watch+skam+italia+season+4+online
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5fcb1287b1088.pdf
    • https://masogivuxun.weebly.com/uploads/1/3/4/8/134887982/8198095.pdf
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/5087595.pdf
    • https://static.s123-cdn-static.com/uploads/4423454/normal_5fff250de6fdc.pdf
    • https://cdn.sqhk.co/kanonilabepi/b2ihgjR/the_crossing_dead_crossy_zombie_apocalypse_roadmap.pdf
    • https://cdn.sqhk.co/jofutagi/TiPjcc4/sonnys_rv_parts.pdf
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/vevax.pdf
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/9426405.pdf
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/kijosafala-jafotaram.pdf
    • https://cdn-cms.f-static.net/uploads/4380237/normal_601f99504c600.pdf
    • http://dirugalaw.22web.org/king_size_flannelette_sheet_sets_argos.pdf
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/tozufapilu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sukobogixe/aai_tuza_aashirwad_movie.pdf
    • https://s3.amazonaws.com/dudigonifu/android_gameboy_advance_emulator_games.pdf
    • https://s3.amazonaws.com/safago/95463905094.pdf
    • http://xovanixavujanu.epizy.com/87621682173.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ed.bin
18b639fa37f1085990e8252cba4696f7a16fec46db48cd58061c672ce363e591		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 4896 bytes
font_01_sfnt_off0000f574.bin
393f5cdf56dd7483b3e2626771214d77374368ffe11a0dcbbca194f09a1bdf63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 10680 bytes
font_02_sfnt_off000119dd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119DD 4324 bytes

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