Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf1e9b276b09ecd…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 00:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: adbb94e12fe89a08adbfe48ec89faeb6 SHA-1: 9bdfcee7649162bb731406e9b19ddaff91c75ef3 SHA-256: 2bf1e9b276b09ecd806a914450477ec052ff143aed9866c8622d02773e1576ec
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though partially corrupted, includes keywords related to calculation formulas and the wkhtmltopdf application, indicating a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=area+calculation+formulas+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408992/normal_6006b4905f019.pdfIn PDF document text
    • http://fenellalucynelle.info/33045247269h06g1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_60136c85410ce.pdfIn PDF document text
    • http://rewita.fun/cobra_29_plus_manualpc3rv.pdfIn PDF document text
    • http://monstergym.ru/bad_blood_book_reviewddrtp.pdfIn PDF document text
    • http://domsale.xyz/police_report_lookup_floridal6wdd.pdfIn PDF document text
    • http://vwwv-avito.online/bloomington_mn_police_department_arrest_reportsbq8al.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5fc944e3c62bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453118/normal_5ff3a863e461d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_5dd5d67a935e4fe9b8f18c108e624d68.pdf?index=trueIn PDF document text
    • http://bakajejupuxa.epizy.com/tifuvesutojexuxepasedili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8bb881-ddca-40e1-abbb-740bd1bb2032/how_many_calories_in_1_bob_evans_sausage_patty.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_001d6ecac93b48a39099db13e1333f94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4832f5a3-f33b-442b-815f-da3b190bc844/the_landlady_poem_ap_lit.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_1aa9151a7ded49fb9eafbfa16f9e26e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cdf9dd-8312-47d2-98da-9cb6ad8c3619/kitchenaid_mixer_model_number_ksm90wh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9ad231-d6a8-4a11-84b4-44f720f5547a/download_film_divergent_sub_indo_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98263066-a58a-403e-8480-059e4a11e4f4/24746457309.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_b9981b9e60ba470aa07fb7e1e8276697.pdf?index=trueIn PDF document text
    • http://jagogapibibolin.epizy.com/495636916.pdfIn PDF document text
    • http://wowawese.rf.gd/atm_ka_full_form_kya_hota_hai.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_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 5288 bytes
SHA-256: 01f74bf909704916413681d6b16754ade6caaeff7d7a56f32818f0f5c3717530
font_01_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 10928 bytes
SHA-256: 8054b359d7c4960f31d6681d5ae0620890debf03c4be9be8e25dbb4ad0b0a358

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