Malicious PDF — malware analysis report

Static analysis result for SHA-256 718238f0f67442f5…

MALICIOUS

PDF

83.1 KB Created: 2021-03-15 08:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 71d215c36c822301e813dbaa674f73e6 SHA-1: c435571e73ec2b467e6d1eb2aba42c4d42c714da SHA-256: 718238f0f67442f596b118010aaf8b8bd3212e825503134de69bda4a3ae89705
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a "PDF_SEO_LINK_FARM" heuristic, with one primary malicious URL pointing to jumiwimov.ru. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a "Pdf.Phishing.Trojan". The document body, though heavily obfuscated, suggests a lure related to "Mhw quest guide". The presence of embedded links and the high ML score indicate a strong likelihood of phishing or malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=mhw+quest+guide PDF link annotation
    • http://bavunexebiri.iblogger.org/posiwalowowerenedagivut.pdfIn PDF document text
    • http://studytogether.fun/where_is_the_car_seat_expiration_date9vz8u.pdfIn PDF document text
    • https://peninugeba.weebly.com/uploads/1/3/4/6/134666339/081dd1f43014d.pdfIn PDF document text
    • http://mscgis.net/vuvukuzotevogogusu30q5z.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/jabefeg-zawokatub-xezuvonugine.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/liwopevudumana_paxamit.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/46637744978ul2lh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/jakanisawez.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/depesujo.pdfIn PDF document text
    • http://nakosaf.rf.gd/what_toppings_go_with_white_sauce_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/pogole.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/gemuwenolerurulatujinami.pdfIn PDF document text
    • http://vujiwexamofone.rf.gd/clinician_administered_ptsd_scale_for_dsm_5_caps_5_past_month.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/ray_dalio_nikkei_asian_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/pokemon_black_and_white_game_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/pabufo.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/murigibumikitotuzak.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/82569434744.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/wubawoxetimapuxok.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/fapexisuxirodelazelovex.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/vudajinanefaloxes.pdfIn PDF document text
    • http://wosipofu.rf.gd/nutritional_status_definition.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 4972 bytes
SHA-256: b46e3ada26ba06df8731654508e827e883db0618bcaca44ef18b8836ac0ef5c5
font_01_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 11096 bytes
SHA-256: 907e258414940a19f5004b25d043bf8017b833ba47909c20eb5fa1c1d4626ec4
font_02_sfnt_off00012864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12864 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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