Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed91208d04911aff…

MALICIOUS

PDF

80.5 KB Created: 2021-04-04 18:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4a0dcd505f6404ea9bfebe0ba745124f SHA-1: a81ac78455f6772005ece3a1c15f98e0bcd12ccc SHA-256: ed91208d04911aff1c329ea346e6de138e685fb130ec245103cfda654539cde0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://fokemale.ru/strik?utm_term=define+financial+autonomy. ClamAV detected this file as Pdf.Phishing.Trojan, and an ML classifier also flagged it with high confidence. The document body is heavily obfuscated and appears to be a lure related to financial autonomy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=define+financial+autonomy PDF link annotation
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/7420974.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/gbjfXii/raid_shadow_legends_pc_and_mobile_same_account.pdfIn PDF document text
    • https://bugupomulu.weebly.com/uploads/1/3/5/3/135396692/2236600.pdfIn PDF document text
    • https://gigodetexopisi.weebly.com/uploads/1/3/4/6/134630538/4401001.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/zudefavozobakavodasa.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/jenemowe.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/PTvggid/indoor_rc_tracks_near_me.pdfIn PDF document text
    • https://jizufozerujit.weebly.com/uploads/1/3/4/3/134343201/9696681.pdfIn PDF document text
    • https://cdn.sqhk.co/zopisipiwele/rhdvqCX/medbridge_home_medical_patient_portal.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/06f713826e6a5.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/RhgDDWU/hepatitis_a_symptoms_in_men.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://65fca3b3-7ce8-4d56-9bc8-ebe46cc5223b.filesusr.com/ugd/f6ed72_31e216bded664e83a4db1a52575d9fdf.pdf?index=trueIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_47ace6293a744eee905d799782d8a6b0.pdf?index=trueIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_8d4b0eeb9ac847798554bc054bc4ed4d.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_6f788b5ee8e648e19216c5835f227779.pdf?index=trueIn PDF document text
    • http://voxumawewu.epizy.com/crock_pot_digital_instructions_symbols.pdfIn PDF document text
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_08c65b39b4fb4726a23a859d87a890a2.pdf?index=trueIn PDF document text
    • http://xexojonorowo.epizy.com/separation_process_principles_3rd_edition_solution.pdfIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_0ae4b554d830478c817fd1b93a10bcec.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_2f3c7f36a28f43eaba184894a8fcc324.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
    • 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_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 4856 bytes
SHA-256: 7c2610b31ae3a54c2c8f5b5ebfb355d51f4c89cd355dd77803610f889e9093a9
font_01_sfnt_off00010f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F02 11148 bytes
SHA-256: a9987feb6ceb299119e4d811920d54684e76041e2fcb663ce41cfdebcbda76bf