Malicious PDF — malware analysis report

Static analysis result for SHA-256 962c2a7f7276a871…

MALICIOUS

PDF

88.9 KB Created: 2021-04-03 03:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcdd3873b19a722f153e7a2f37f38dc5 SHA-1: a847bdf84e5826f8537546b219c43dd5a07865b3 SHA-256: 962c2a7f7276a871c0fff27998bad76781a8cf98590e20d3b1e655a17418872a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://bologen.ru/wix?keyword=inquisitor+pathfinder+guide', is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-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://bologen.ru/wix?keyword=inquisitor+pathfinder+guide
    • https://cdn.sqhk.co/xusovatovu/cTaibDf/molitaxobasadezesik.pdf
    • https://siridadujaxata.weebly.com/uploads/1/3/0/9/130969300/biwenuvivakivupatosu.pdf
    • http://bitunowaluf.sportsontheweb.net/93674551780.pdf
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/japolevos.pdf
    • https://cdn.sqhk.co/vugujebeku/ysgfhj5/smart_in_pays_mlm.pdf
    • https://cdn.sqhk.co/wojinagimepu/jgiajiC/visizusawori.pdf
    • https://cdn.sqhk.co/zajikeze/VWDjibC/87610514833.pdf
    • https://cdn.sqhk.co/nisavivurefu/e1A9gfR/akimilaku_remix_song.pdf
    • https://tevidozeji.weebly.com/uploads/1/3/4/8/134887032/41c3cdd118.pdf
    • https://cdn.sqhk.co/zikonidenijo/0KgdAAq/finger_slayer_wild_mod_apk.pdf
    • https://savaxibinis.weebly.com/uploads/1/3/3/9/133997587/7b7825d8b1bdc1.pdf
    • https://cdn.sqhk.co/turaxulefa/gi5hfib/dibosixutatipado.pdf
    • https://cdn.sqhk.co/tazifawixax/0ij2nAA/nfl_fantasy_football_auction_draft_strategy.pdf
    • https://cdn.sqhk.co/zoluxoni/WieThbP/dunanivotanegulirixemol.pdf
    • http://kemamibuke.mygamesonline.org/70945212648.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tixeligufokup/94185879254.pdf
    • https://s3.amazonaws.com/juwofuxufijup/kemesirazumuvovajujexuku.pdf
    • https://s3.amazonaws.com/fulazelof/essential_vocabulary_for_toeic.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/vezepatorexatit.pdf
    • https://s3.amazonaws.com/nemafu/weber_premium_grill_cover_spirit_ii.pdf
    • https://s3.amazonaws.com/gezejoputiwinu/90921382569.pdf
    • https://s3.amazonaws.com/fedure/21792635786.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_off00012132.bin
e7994909518d09cdd1a85c7b7b9afbbdc7dccba4ebf262f36fb3e6aa17c73516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12132 5332 bytes
font_01_sfnt_off0001334e.bin
5d360a22e2fbe50438ab74dc073655dece2a0a4262b1e4fdfc080b7e20d389a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1334E 10256 bytes

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