Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d0510528eb773e…

MALICIOUS

PDF

83.8 KB Created: 2021-03-09 10:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0c3d0015b74a17fb9abc6f436d69e8c6 SHA-1: 2149dfc9b955238b05ae54d0d56addcc1155f205 SHA-256: 08d0510528eb773eca82de5a88ea43b3c826b6e9276da1203b990d33ccba2d7c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the sheer volume of external links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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/aws?utm_term=how+waterproof+is+jbl+xtreme+2 PDF link annotation
    • https://cdn.sqhk.co/kososojog/IhauhfI/fisigobo.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/how_do_you_check_transmission_fluid_levels.pdfIn PDF document text
    • http://jetavimazi.22web.org/kappa_size_guide_uk_womens.pdfIn PDF document text
    • http://lumurezekosarew.66ghz.com/cat_cartoon_song_video.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/webasikix.pdfIn PDF document text
    • https://wivixovipi.weebly.com/uploads/1/3/4/4/134442696/8372892.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/jjO3giX/51527373445.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/how_to_build_a_sturdy_bridge_out_of_toothpicks.pdfIn PDF document text
    • https://zitejapaj.weebly.com/uploads/1/3/1/8/131872087/7174241.pdfIn PDF document text
    • https://topipanonotege.weebly.com/uploads/1/3/4/6/134679812/6705375.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/mowigajodalira.pdfIn PDF document text
    • https://zerivomixiloz.weebly.com/uploads/1/3/4/6/134664353/pebobasew.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/vIjcmii/horizon_flight_simulator.pdfIn PDF document text
    • https://zosomezo.weebly.com/uploads/1/3/0/9/130969149/615f03402c541ed.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/164f5ec80209.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/jg0hf9a/xefosubuzetememozugaxus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/lomibiwukesozo.pdfIn PDF document text
    • http://gebogozomusedom.rf.gd/dengeki_bunko_fighting_climax_ignition_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364ed3dd-1940-4a17-99c1-35db7bb3eb54/dafomatepugidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8708f9c-885e-4a5f-93db-692364b7a4b3/29434754440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/179c1ce2-5238-4c19-b8c1-291b1b687cb3/what_are_sentence_starters_ks2.pdfIn PDF document text
    • http://woxenebifa.rf.gd/how_many_calories_in_chick_fil_a_breakfast.pdfIn PDF document text
    • http://zukugomofam.epizy.com/momigizobonija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b18c593b-118b-4b8c-9bf9-a011d5c7ab54/jaybirds_x4_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8640885e-ed19-4ba9-be14-99d057c285d7/47370015379.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 5516 bytes
SHA-256: 8eb1b7b31302d4decb89ec34e527aa21fe3f1a6e2eecd7123456d626ebd6c534
font_01_sfnt_off0001065d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 11252 bytes
SHA-256: 73f73a2bd1e1eaff103933052c283ff2e4a570ed71d32a2782ec752c75397e63
font_02_sfnt_off00012c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C55 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3