Malicious PDF — malware analysis report

Static analysis result for SHA-256 78253e498a4b599a…

MALICIOUS

PDF

82.4 KB Created: 2021-03-14 20:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 894fbd704033fbd21ecbb010c0c79ce7 SHA-1: fef17abba40c7dad4e575ca3ec21aef63a8f7170 SHA-256: 78253e498a4b599aac61d255767b7de7cb8128dd6e726f3bd7616a6faa9fe993
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs, with a primary URL pointing to 'bologen.ru'. The document body, though heavily obfuscated, contains text suggesting it is presented as a search result for adult content, likely a lure to drive traffic to malicious sites. No scripts were extracted, but the presence of a link farm and external URIs suggests the primary goal is redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://bologen.ru/wix?keyword=xaviera+hollander+la+alegre+madame+pdf PDF link annotation
    • https://bogevojozoluki.weebly.com/uploads/1/3/4/7/134708627/pozutu_zivilovubiwatij_lirarorajuraro.pdfIn PDF document text
    • http://tuwedoviwe.iblogger.org/38258031059.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/969026.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/3095647.pdfIn PDF document text
    • https://defuboxuzunusam.weebly.com/uploads/1/3/3/9/133986960/6c9d0e2c441.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/rixef_xajanuvotodi.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/dfb663f7-f6cc-4dab-8468-b35ec1488727/craftsman_snowblower_parts_edmonton.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/xelidutawogoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf7ff47-2005-43e0-8dac-56e5ec917583/19051686943.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/bollywood_acapella_song.pdfIn PDF document text
    • http://xaduvegovoz.rf.gd/crystallography_of_martensite_transformations_in_steels.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/lenovo_thinkbook_13s.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/bivepipawonibosasosowoged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12aa53f-5559-47ab-b125-c9ee14a81ed8/koguzewakozadapilepat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8e8e6d-233c-46bf-9613-99dee96599a0/79113873368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38836a41-b073-46c8-9601-9490f968ecd8/xizuxu.pdfIn PDF document text
    • http://retukazitoja.epizy.com/alesis_q25_ableton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41dacd9a-edce-4c14-b737-1ad18bdb1c6d/56372922621.pdfIn PDF document text
    • http://donofetesexok.rf.gd/circulatory_system_organs.pdfIn PDF document text
    • http://vosimamasi.epizy.com/proper_squat_form_t_nation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed88aadf-ac98-409d-bf0a-6204f40f6e44/best_english_learning_course_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/464e5023-353d-4ec0-9e03-c32e63631eb6/computer_networking_a_top-down_approach_sixth_edition_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/wojuronunokifafojajenamov.pdfIn PDF document text
    • http://tijepexaran.epizy.com/thetford_toilet_leaks_when_flushing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8f7df6-929f-4135-9f7c-e4343e8e65c1/texuxeguwoniralirevela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1f91ad-cc0b-4ec6-965b-611dab452542/75464279438.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_off0001013d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 5316 bytes
SHA-256: 94172c7e2991b80a5b8aac5db9a76848504633627358bea6b316164651f7fe7d
font_01_sfnt_off00011331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11331 12476 bytes
SHA-256: 2defffa18f685adc97b7518008568408635f7ec97c2210967dd494fbbc3770d3

Open this report in the interactive analyzer, or submit your own file for analysis.