Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fdea8e5225259af…

MALICIOUS

PDF

97.9 KB Created: 2021-03-17 02:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 149cab22e8690e71514020d03ecfca30 SHA-1: 6ee250e7f6096860c82d2b70d2c5d8bdce6ef025 SHA-256: 8fdea8e5225259afbb38286334c6ac6252570313c8f2f8eb63c80c5e9b1cc054
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and a link farm heuristic strongly points towards an attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=gigi+jerseylicious+2018 PDF link annotation
    • https://cdn.sqhk.co/bafebolabefo/O6pgdjd/pikopozodizi.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/XVjgwtN/spanish_classes_latin_america.pdfIn PDF document text
    • http://confirmationhelpcenter.com/2000_chevy_blazer_rocker_panels6fxae.pdfIn PDF document text
    • http://zubiki.top/road_reports_m11khasx.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/aNB2URy/86301067614.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/tesisimakebelonen.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/jbihjjs/72811643870.pdfIn PDF document text
    • http://intereriia.com/industry_standard_sheet_metal_fabrication_tolerancesdwg6z.pdfIn PDF document text
    • https://ramowofotaro.weebly.com/uploads/1/3/1/6/131607053/fudibejusi-boxoleba-weduweremoj.pdfIn PDF document text
    • https://jedadizonavo.weebly.com/uploads/1/3/4/7/134721040/6f2f059d79d8aaa.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/ijmvXDf/savage_swag_girl_cartoon_wallpaper.pdfIn PDF document text
    • https://veretiwuwe.weebly.com/uploads/1/3/1/4/131406621/nofak.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/ae22fb335889.pdfIn PDF document text
    • https://kudaxemukuwofi.weebly.com/uploads/1/3/4/6/134691428/8075902.pdfIn PDF document text
    • http://wide-take.top/lazagugabevix77tsb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vowurereluvox.epizy.com/61349189380.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_fd7c6b3f1b4042738162853671c50947.pdf?index=trueIn PDF document text
    • https://b6d28218-96ba-4f98-b9c1-0d78b4e6fe84.filesusr.com/ugd/47aa88_567e7b0043ab4716b501c08a00cab83e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipeboro/famokixofowameg.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/26072104600.pdfIn PDF document text
    • http://fusufovonezep.rf.gd/how_do_you_change_a_safety_first_thermometer_from_celsius_to_fahrenheit.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_dc412f1241474812ab7eac97eb283c1f.pdf?index=trueIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_3e10e86435a94b4eb4e4553801ea28b2.pdf?index=trueIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_88da2c2c17b1403eb10f7037344bf24a.pdf?index=trueIn PDF document text
    • http://sojizodujibibo.epizy.com/catchphrase_card_game_answers.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_off00013dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD3 5484 bytes
SHA-256: abecff4d79e7e8b8b4e2d0c1e42e85638c98caff506265994d6c83af3c8e5b11
font_01_sfnt_off000150ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AB 11860 bytes
SHA-256: 8d6e32366cffac70998b73a865ab9402f4c2be60cadd03d88f3e9150fca659a8