Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79d09aa61555250…

MALICIOUS

PDF

74.3 KB Created: 2021-05-07 01:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f24f997daff079bdd485940ca18724a4 SHA-1: 9195cf648323fc145c9b1e373628eb549a30381d SHA-256: a79d09aa6155525085db0cfb702ac41a85035108002dc8ea3b2884645f5dd1fc
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, suggesting it is part of a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be a lure related to 'ice cream maker parts'. No scripts were extracted from this sample.

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://leonvi.ru/strik?utm_term=rival+8455+ice+cream+maker+parts
    • https://cdn.sqhk.co/luxixumogez/ggfpKJh/16361572441.pdf
    • https://cdn.sqhk.co/xeliwiwogivo/jiMjgVx/57270220932.pdf
    • https://cdn.sqhk.co/livukigelo/ghgggja/manualidades_reciclados_para_navidad.pdf
    • http://fivadoguna.medianewsonline.com/tapijubopunixa.pdf
    • https://cdn.sqhk.co/fapetemiji/joQbwgj/luxotebinubuwavi.pdf
    • https://cdn.sqhk.co/xukigipeduve/jfrgijd/51074640709.pdf
    • https://cdn.sqhk.co/nowonipewo/isHiejc/raleigh_rescue_mission_thrift_store_wake_forest.pdf
    • https://cdn.sqhk.co/satidaruxami/fghghha/space_colony_games_pc.pdf
    • https://cdn.sqhk.co/zarepowake/Db2gehb/wamuxoripoxanugalazuxe.pdf
    • https://cdn.sqhk.co/xaripisi/dT8w0gj/sniper_zero_build_72.pdf
    • https://cdn.sqhk.co/ravawiku/6ibNiuR/videos_engracados_para_status_do_whatsapp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jesidofefe/pepipudupumu.pdf
    • http://weparaxopulo.atwebpages.com/sudedebusavakiretedoladi.pdf
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_351ae45ad3a54fecbd273c00e9042e26.pdf?index=true
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_9d637e0b4e484c1a8712f005d0fd02db.pdf?index=true
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_5436f1dc062d4980bfc9a4f656c3df6a.pdf?index=true
    • https://s3.amazonaws.com/tuxenipup/owners_manual_ge_dishwasher.pdf
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_3be7361d0b104135a33e68b56c599fa5.pdf?index=true
    • https://s3.amazonaws.com/rakabexozu/happy_birthday_to_you_funny_song.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_off0000e42a.bin
a404a914e6832009e4b5b66694bea24449e46a4ff129387d6a15aac6054d64c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42A 5616 bytes
font_01_sfnt_off0000f744.bin
ea9d6bd0c1a20257aafc912635feb105f03d29d611801c413508f1e75c34f1de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 10880 bytes

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