Malicious PDF — malware analysis report

Static analysis result for SHA-256 28942396ff782698…

MALICIOUS

PDF

80.2 KB Created: 2021-03-06 14:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f19a09ece77bc320f8bc247502b9c46d SHA-1: 2627cb5e5e80aa283a2b27a5ae9f099eff6d486d SHA-256: 28942396ff782698274f9d502bf95e7a16b6daa7bbbe49e067021536ff790723
126 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution attempt. The primary lure appears to be a fake 'Spotify download apk hack' link, indicating a social engineering tactic to trick users into downloading malicious software. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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://dugedepap.ru/wix?keyword=spotify+download+apk+hack PDF link annotation
    • https://cdn.sqhk.co/mivezifov/hiQij9q/42696382077.pdfIn PDF document text
    • http://daddytestit.xyz/35232780588ispt6.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/1Biaid9/miro_app_review.pdfIn PDF document text
    • http://mugedly.xyz/zombieland_2_madison_returnstaj12.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/heghYQl/32645885092.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/7Eiiiek/ea_sports_ufc_2_game_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/jMwkbVP/niziku.pdfIn PDF document text
    • http://acgmgroup.ru/anlage_er_2018jwg5u.pdfIn PDF document text
    • http://podcard2020.site/25391332292xtivh.pdfIn PDF document text
    • http://copalofa.site/suxewebibudaxobesefefunod8ap1x.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/2yjhiel/73336910020.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jiagcie/cartoon_wars_3_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/zixedagiro/bCe63he/human_fall_flat_ps4_split_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/Sfidhf3/fafunedanusilupepux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_123240bb97e94eac8ef0f7aac9a69764.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9904edba-5f0b-49b8-83dc-945f12dc74ff/kovakewakilipavetibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f557f9-6837-4474-a499-5817fef994f3/what_math_is_used_for_engineering.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_41dbf0e4739d45e0b50339a8427f200f.pdf?index=trueIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_645f9107bd4940029a790a5ee5482f7d.pdf?index=trueIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_3e0dddc12e354923b20714fbebb9b86a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a403ae9b-846b-4192-85de-280f6a4765d4/vanuvenunatisezilug.pdfIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_b08e4569f0524afe83d0355894cead86.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 5000 bytes
SHA-256: c62a5a17709503133aa93576e6a9a2a19dcff07ff5b26050e7951f5199ce54c8
font_01_sfnt_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 10516 bytes
SHA-256: 32ba6f46c728dfc9510b7f9c899175411a6f232a1a8827598348b2ffea7e635b
font_02_sfnt_off00012569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333