Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b045eb801f6753f…

MALICIOUS

PDF

92.7 KB Created: 2021-03-16 17:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 65c7f933f673e00125325f907eaf91fd SHA-1: 7c6e8dc9f114ba73b6273fcc5d6c56ba8297252e SHA-256: 2b045eb801f6753fd9f05dc5c409d666976fc732f784bc75fcd85d1a5357c836
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, 'lozipotod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Vejiga hiperactiva tratamiento pdf'. No scripts were extracted, but the presence of external links and the heuristic firings strongly indicate a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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=vejiga+hiperactiva+tratamiento+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369499/normal_601040c3e90b8.pdfIn PDF document text
    • http://fruitik.space/morubebavx59y.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/giggUje/digital_marketing_careers_salary.pdfIn PDF document text
    • http://mitefakosutupot.22web.org/84128593142.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501777/normal_5ff7819ab74fb.pdfIn PDF document text
    • http://vostokzapad.su/mulixejodojisonub3jrkv.pdfIn PDF document text
    • https://cdn.sqhk.co/febutatesu/UIqhhfI/75519578211.pdfIn PDF document text
    • http://raftgjgr.space/event_poster_templates_free_powerpointd8ne9.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/wibzywG/9629803610.pdfIn PDF document text
    • https://cdn.sqhk.co/purawewus/ejexnhg/14155339128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5ffd56fcd356a.pdfIn PDF document text
    • https://cdn.sqhk.co/zetarizelub/biat2EV/93601390345.pdfIn PDF document text
    • http://eferevole.com/how_to_remember_the_sailors_creedqyygy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419193/normal_5fffbd1fd044a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5fdf37c6e93b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e247bb14-f6af-4512-b354-36cb282df3d9/jatonam.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_65f720322565406d842706d360e1094e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/132e8f55-ebce-434b-828e-ac4e5a2b28e1/how_to_program_honeywell_5834-4.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_e49bbef93af043b0a1a06a0ec218c1e2.pdf?index=trueIn PDF document text
    • http://kapupexuninub.epizy.com/someone_somebody_anyone_anybody_exercises.pdfIn PDF document text
    • http://pebumeb.rf.gd/animal_culture_media.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_1c367a7732e94e46ad17ec65ba9cd0ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e023881-ae38-4030-8ece-11b9d27e7540/stanley_4_gallon_shop_vac_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47217b77-b2a4-4fe4-9952-73fe26aa67c9/sony_ht-ct780_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8312d313-e978-4c5d-84b1-6065014928a0/23323143367.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_17288b502b7b4ba58eff71da48b9d0d4.pdf?index=trueIn 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
    • https://medlineplus.gov/spanish/overactivebladder.htmlIn 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_off00012b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B98 5460 bytes
SHA-256: 0d211ca87d7b290e33c64989ad1bc754ee23c7bef7afd3eae4737588f51f32aa
font_01_sfnt_off00013e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E17 11580 bytes
SHA-256: e854a42d94b3dc450bf56a9dcdd1424144edefafc2e275abda26bcce8b3895cc