Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea5c618365dbcb3…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 09:20:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39797e5022bb63b30883458cb7ee861e SHA-1: 4005a6c0a170463f7a9254a1eebdf0882dc33d90 SHA-256: 1ea5c618365dbcb3f6a7d4603d9f2bf97e1f1613e5925d58f7972cc298bef9fc
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded external links, many of which are part of a link farm designed to appear as legitimate content, such as game mods. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=mini+militia+unlimited+health+mod+apk+2020
    • https://cdn.sqhk.co/siwebove/djaiiji/darosutanutanaxizetizene.pdf
    • https://cdn.sqhk.co/xaripisi/9jfgd89/vozilirawikekodiv.pdf
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/beaf9c.pdf
    • https://cdn.sqhk.co/takoxuwal/bhjwTmi/aspiring_guides_mt_cook.pdf
    • https://cdn.sqhk.co/jagibuvat/ihjhjI9/20369702098.pdf
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/rutijiwamiziwe.pdf
    • https://cdn.sqhk.co/rajemaramiw/xhbHgjd/situlaluzopetilujuganire.pdf
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/75b2626e.pdf
    • https://topazezinin.weebly.com/uploads/1/3/0/9/130969714/tobibepojixisux.pdf
    • https://fosisejabevenot.weebly.com/uploads/1/3/5/3/135398983/naxemaxil-norusobatalalof-tubovalig-nusuw.pdf
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/2711765.pdf
    • https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/ec0188414a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a0f2a8f-e2c0-4fe9-96cd-3d2c4c558282/10594787344.pdf
    • https://uploads.strikinglycdn.com/files/23b5ce06-46ae-49d4-b373-a1b6327e7a7c/good_persuasive_essay_topics_for_grade_8.pdf
    • https://uploads.strikinglycdn.com/files/52f7f257-2a75-45a5-99d8-ce571a1f3b8d/my_kitchenaid_refrigerator_stopped_cooling.pdf
    • https://uploads.strikinglycdn.com/files/36c0a13f-7db4-4a98-b4df-df96ca85c168/dn_5.1_sony_dav-tz140.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/lion_the_witch_and_the_wardrobe_book_cover.pdf
    • https://uploads.strikinglycdn.com/files/a2571a01-f997-444e-b238-540f9e56885a/bufavazujujiv.pdf
    • https://uploads.strikinglycdn.com/files/1cfa119a-76b0-43bc-87ac-1bc64a0b2db3/free_willy_3_streaming_altadefinizione.pdf
    • https://uploads.strikinglycdn.com/files/e98a2875-e181-4b83-bcf3-fe1661748127/37423666326.pdf
    • https://uploads.strikinglycdn.com/files/c8df3cf3-4589-4fe1-8d48-cfda161cac49/how_do_i_know_when_my_zagg_keyboard_is_fully_charged.pdf
    • https://s3.amazonaws.com/wefadep/buvotuzoragudi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b1.bin
9ad7a47d1268d33a7e283653625586bd252ae9760961ec0485ccc9e3a44d4e08
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 5268 bytes
font_01_sfnt_off0001067b.bin
a5c82e77487896141b98ffb089c576f8732476aced3589321344421367662bc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 11224 bytes