Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50a272e85e4be2a…

MALICIOUS

PDF

87.8 KB Created: 2021-03-30 15:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4741401ec616c21d757244ff43f7de49 SHA-1: b283ced7c23241dcb919e1bb1078439e5f5b82a1 SHA-256: a50a272e85e4be2a56d67646cb5e8efe3c99907cc0560f8e5f0af4c7e8c150e8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs, such as 'https://lozipotod.ru/wix?keyword=old+testament+scripture+mastery+rhymes+doctrine+and+covenants', are indicative of SEO-based lures to drive traffic to compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=old+testament+scripture+mastery+rhymes+doctrine+and+covenants PDF link annotation
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/8b137487e203696.pdfIn PDF document text
    • http://xapiduxirob.mywebcommunity.org/acuerdos_comerciales_del_peru.pdfIn PDF document text
    • http://rawenspant.online/fesejidewokuwevafotids4abi.pdfIn PDF document text
    • http://yatvoyya.fun/alcoholics_anonymous_big_book_dictionaryjyj96.pdfIn PDF document text
    • https://sidevobu.weebly.com/uploads/1/3/4/8/134866687/166556353d84.pdfIn PDF document text
    • http://bubble1.space/wadun8kor6.pdfIn PDF document text
    • http://puduvab.sportsontheweb.net/data_acquisition_and_processing.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/88424218868.pdfIn PDF document text
    • http://unlockdeals.shop/english_test_for_beginners_worksheetfvxz5.pdfIn PDF document text
    • http://requiremcgood.com/hana_kimi_read_onlinequi3r.pdfIn PDF document text
    • http://kijomino.iblogger.org/bigizupupasebudaxekom.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/diwitapezu/is_the_fender_hot_rod_deluxe_a_good_amp.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/63851754098.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/32985677655.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/attitude_and_behaviour.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/what_is_deterrence_in_government.pdfIn PDF document text
    • http://sobajagas.rf.gd/29479448112.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/google_sheets_query_counta.pdfIn PDF document text
    • http://sowarom.rf.gd/summer_infant_mill_valley_safety_gate_-_wood.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/trigonometric_identities_practice_worksheet.pdfIn PDF document text
    • http://taroveruwidiba.onlinewebshop.net/hot_springs_vanguard_filters.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/xalobareko.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B4 5500 bytes
SHA-256: 01d6dccada7efd838a81e305e9d1896805edc5ac754d2f1c34cec9908d7606a6
font_01_sfnt_off00012b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B46 11120 bytes
SHA-256: 02f9733232462dc457315560a016c051ca68b81729cd456f810b0d760185b35e

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