Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dd9c48a5222e9e…

MALICIOUS

PDF

85.0 KB Created: 2021-03-29 21:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f415683933596cf421fa240f8048c86a SHA-1: 50242d1ade152f6eeb7a268fa79005e8d2a47ba0 SHA-256: 04dd9c48a5222e9eb2ecac100d3ac49f8da473c383c0423f51bcdf033a23b0b2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. While no scripts were explicitly extracted, the presence of external URLs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=what+does+bagheera+mean+in+hindi
    • https://static.s123-cdn-static.com/uploads/4491936/normal_5fff31fe0a732.pdf
    • https://latifaxegorur.weebly.com/uploads/1/3/5/4/135400737/1877370bb6021e.pdf
    • https://cdn-cms.f-static.net/uploads/4386836/normal_600bbd3d47c9d.pdf
    • https://lipamonevarila.weebly.com/uploads/1/3/1/4/131453989/giripipanopa.pdf
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/234474.pdf
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/6888788.pdf
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/depugudokenuxosaso.pdf
    • https://rupilobeva.weebly.com/uploads/1/3/0/7/130775598/ferizakuforopak.pdf
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5fe25a36beaab.pdf
    • http://rilotelexewobos.iblogger.org/circuit_breaker_ratings_and_specifications.pdf
    • https://static.s123-cdn-static.com/uploads/4411918/normal_5fcd41de8c22e.pdf
    • https://malavaxun.weebly.com/uploads/1/3/4/0/134018228/784545.pdf
    • https://cdn-cms.f-static.net/uploads/4388162/normal_6045eab35c012.pdf
    • https://tubuwixufadone.weebly.com/uploads/1/3/5/3/135315283/9204483.pdf
    • https://bulobazopikiju.weebly.com/uploads/1/3/0/7/130776241/fipelu-loboze-gedadu-pifaxepe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/33469d95-dfaa-4fb2-bc92-f5d3bd716ad9/how_do_i_change_the_dst_on_my_g_shock_ga_100.pdf
    • http://sisubupofi.epizy.com/what_does_charging_error_5_mean_on_roomba.pdf
    • http://jedigosegukigif.rf.gd/84009732340.pdf
    • http://lapodalojowev.rf.gd/antagonistas_de_los_receptores_de_leucotrienos.pdf
    • https://uploads.strikinglycdn.com/files/a61dea1a-080b-43de-a5a2-54d3ef770044/best_fishing_rod_and_reel_for_redfish.pdf
    • http://zumijuxuv.epizy.com/switch_pro_controller_blue_light_stays_on.pdf
    • http://famirafopuremu.rf.gd/makalah_arteri_dan_vena_ulcer.pdf
    • http://valumaj.epizy.com/asma_tratamento_fisioterapeutico.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_off000102a0.bin
8f93d3213da92e201af4224a890e0d18a9b5e1c0d93154b8970e0c22814114ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 5360 bytes
font_01_sfnt_off000114bb.bin
90ffb8a124695140223653963e702b5c6f9ae6995547468e7b5c57c7fab4bea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x114BB 11080 bytes
font_02_sfnt_off00013a8e.bin
7606e3510c751f0f78fd2bc31039582ee92ef03448d4788464312934ee507441
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8E 2808 bytes