Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48e16a6c717214c…

MALICIOUS

PDF

74.0 KB Created: 2021-03-07 23:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 07b053b4264a11e684d56f5db345e81d SHA-1: 4660587e92eec93ebfccc0bb92cf95e6e9e8f51e SHA-256: f48e16a6c717214c6af08f3d4370026191978ea7e52697961917e614d9dac664
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable domains, suggesting a phishing or spam campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/wix?keyword=jenifer+junior+high+bulletin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465694/normal_603a4641eaa98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_603c866c083a7.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/vaderadunivipupogoteda.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/vitimobud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_6038cc7a8a58c.pdfIn PDF document text
    • http://mibejar.sportsontheweb.net/electrical_autocad_blocks_library_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_6035642f42101.pdfIn PDF document text
    • http://dududuw.mypressonline.com/sagirubagimevozogiresuz.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/34747378628.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/68155272538.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/walmart_black_friday_ps5_restock_time.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472506/normal_5fcf5dfc8bb6b.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/xijubuluse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xodenumaverap.epizy.com/brastemp_retro_manual.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_a3aca8bd21b6429d8f4a6be13ade50c6.pdf?index=trueIn PDF document text
    • http://kusababi.onlinewebshop.net/95459934790.pdfIn PDF document text
    • http://vanepozimor.rf.gd/97120835023.pdfIn PDF document text
    • http://rezopaduj.epizy.com/lenovo_thinkpad_t430_specs_i7.pdfIn PDF document text
    • http://wiximevisek.epizy.com/is_there_a_gre_fee_waiver.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_dabb87b1725046e0a80b3c4943b5dd4e.pdf?index=trueIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_bf6b5e091e27462783a98c497381e103.pdf?index=trueIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_59b928c1395f45cba9cda679122c15d0.pdf?index=trueIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_ef2b49669e96404f8979f7df5091ee46.pdf?index=trueIn PDF document text
    • http://wudazebej.atwebpages.com/taxodidovuwiwoludofes.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 4844 bytes
SHA-256: 2c49876a542dd2be4d467dc3c37d53c03d68342036fcced6d03b371d6a4cf20c
font_01_sfnt_off0000f6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DC 10424 bytes
SHA-256: 8db1de62b55b2ee1f8a1411673cfb225663d03e0696dd94afd7fd45d8fd94994

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