Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2cb3510c266065…

MALICIOUS

PDF

76.3 KB Created: 2021-06-07 12:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8f3cd127213bf992f030e8b6c65c725 SHA-1: d13508be4b1025dad427b4a49a633687fe8190f1 SHA-256: da2cb3510c26606567efd745e8e8a1c72d85e392ae89d4b47357c2147803c270
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or lead users to phishing sites. The presence of a URL related to 'djay 2 app free download for android' indicates a lure for software downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • 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://queure.ru/pbw?utm_term=djay+2+app+free+download+for+android
    • https://napakako.weebly.com/uploads/1/3/0/9/130968915/d0cc346752.pdf
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/zokoke-kosesala-ruvisokotupo.pdf
    • https://getariko.weebly.com/uploads/1/3/4/9/134904460/7000339.pdf
    • https://rixabala.weebly.com/uploads/1/3/4/7/134730828/9110148.pdf
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/7547646.pdf
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/rokibav.pdf
    • https://cdn-cms.f-static.net/uploads/4497081/normal_603839fea5387.pdf
    • https://damupose.weebly.com/uploads/1/3/1/0/131070457/sadixi.pdf
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/busate_dekezomavuwono.pdf
    • https://gutamunimidujad.weebly.com/uploads/1/3/4/6/134667749/1f30d258c.pdf
    • https://vuzigalami.weebly.com/uploads/1/3/5/9/135960382/8d2e85ea6d.pdf
    • https://suxewanevot.weebly.com/uploads/1/3/4/5/134595646/rurevejalanu_jitopufo_finelolivotoduw.pdf
    • https://vefarekosisag.weebly.com/uploads/1/3/4/7/134722728/8551365.pdf
    • https://melejorun.weebly.com/uploads/1/3/0/7/130775242/lupebukinumur.pdf
    • https://cdn-cms.f-static.net/uploads/4475729/normal_6035821e56f07.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/93364eed-5ac8-4348-a2c2-3a8c65a9d498/lunafizofanenamufad.pdf
    • http://banusiv.pbworks.com/w/file/fetch/144446721/does_thinkorswim_have_real_time_quotes.pdf
    • http://paderukut.pbworks.com/w/file/fetch/144443652/59382223242.pdf
    • https://uploads.strikinglycdn.com/files/958f09b2-b37a-4e4b-8aa7-7b60a2833f3d/is_the_book_midnight_in_the_garden_of_good_and_evil_based_on_a_true_story.pdf
    • https://uploads.strikinglycdn.com/files/2a1d2565-5af7-4886-bf27-ecdb3db9d195/nomugevuwabofexanokibog.pdf
    • https://uploads.strikinglycdn.com/files/e5730a7c-5305-4820-9d39-ac49e43cce91/zolokolapej.pdf
    • https://uploads.strikinglycdn.com/files/2ca56c80-cf33-4399-a517-cb363c951224/dd_5th_edition_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e047.bin
65e2da3714d8cd26ace0ab629e1ebc9fdf5fe762f241701a79ec48e6b8393dbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 4964 bytes
font_01_sfnt_off0000f154.bin
68e568a5d853447104d99dc6191df90d83dfdf8dc5c3acb31986e3bd1583915a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 10628 bytes
font_02_sfnt_off000115ac.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x115AC 4324 bytes