Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7a9d60d3c88bda…

MALICIOUS

PDF

78.6 KB Created: 2021-03-13 22:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4297425aff704262613ed516670b7c6 SHA-1: e88a439c0ef66b161a3bf7e0a0a080c650391d6a SHA-256: fb7a9d60d3c88bda3cd929ac6ed2a9d40970d90534680424a0a61f67545f6eb2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and a specific URL that mimics a Google Maps location sharing feature, suggesting a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature. No scripts were extracted, but the PDF structure itself is used to host and distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=google+maps+share+live+location+iphone
    • https://cdn.sqhk.co/kizafizutuw/zdithfr/globe_prepaid_card_failure.pdf
    • http://lorenbayi.com/agilent_34401a_user_guide2j4hj.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/ijZq1Yb/hashtags_that_give_you_more_likes_on_instagram.pdf
    • https://cdn.sqhk.co/fabokofe/98zjcih/wipak.pdf
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/xatevoniza.pdf
    • http://stingeksoj.online/jewuritapopksfth.pdf
    • http://vetozadep.mywebcommunity.org/horus_heresy_board_game_1993.pdf
    • https://nizerekudoni.weebly.com/uploads/1/3/5/3/135383630/sirawodabufe.pdf
    • http://tifusavegapawuf.mygamesonline.org/is_the_book_divergent_appropriate.pdf
    • https://rijopadanag.weebly.com/uploads/1/3/1/0/131070137/dutekesus.pdf
    • http://amsidgi.xyz/57000964181yunc7.pdf
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/cb5385.pdf
    • https://cdn.sqhk.co/kekotenonaxu/ichbcgf/83377951616.pdf
    • https://tofeligekejogen.weebly.com/uploads/1/3/4/8/134873344/vipudinufenubug_fokodedepa_nonazasuki.pdf
    • https://bodovusinorone.weebly.com/uploads/1/3/5/3/135347185/rowadol.pdf
    • http://luloxijemise.medianewsonline.com/bengal_famine_1943.pdf
    • https://resivoviwogo.weebly.com/uploads/1/3/3/9/133987135/zaliloje-mivedasa-tanoxofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zenakezogutomu.onlinewebshop.net/how_to_calculate_compound_daily_interest_in_excel.pdf
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_72925f4c0df846779272ffef29005c81.pdf?index=true
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_cb741f530dcb43dba8a64e4b71d7f654.pdf?index=true
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_cc679244019049da9860f9061ec9abdb.pdf?index=true
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_dee07b0d8d93444d8da6854dffee23b6.pdf?index=true
    • http://ratobewiwigu.atwebpages.com/pan_africanism_download.pdf
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_06ffa59ff4db4718a1b610f6baacaf56.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_off0000f611.bin
d7bcac4a029fdced7f4bca9ed62ae877c175647abad7295a03299f8abee84c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 5440 bytes
font_01_sfnt_off00010870.bin
0c0e8348252c3805138506b97cea08b3427ebe0cffade25ad3714ec6be71b347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10870 10616 bytes

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