Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78159b7aa7a7215…

MALICIOUS

PDF

89.5 KB Created: 2021-03-28 10:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42e0c9bed9c58876c14184713bbca788 SHA-1: 7900527b3ff66d522af53f4e1637c34df47af14d SHA-256: e78159b7aa7a7215a94d6f46749e023b2890c77bd274627cdabd3a756accce29
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or phishing campaign. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to external content, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=inateck+bcst-70+bluetooth+barcode+scanner+kabellos
    • https://cdn-cms.f-static.net/uploads/4460975/normal_604cf45d29e0d.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_6046c58dd653c.pdf
    • http://moreprodukti.com/kpis_sample_templatejfuqz.pdf
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5fd992ac675a2.pdf
    • https://cdn-cms.f-static.net/uploads/4480904/normal_601bd2ecd2224.pdf
    • https://cdn.sqhk.co/zoribakim/xidhccF/stone_blast_pan.pdf
    • http://rusakova.space/marine_net_warfighting_answersvrioo.pdf
    • http://tafuvomilo.22web.org/html5_download_attribute.pdf
    • https://static.s123-cdn-static.com/uploads/4458144/normal_6008d125f313d.pdf
    • https://static.s123-cdn-static.com/uploads/4373505/normal_5ffc4702a3523.pdf
    • http://vinograd.io/2733498719796wpe.pdf
    • https://cdn-cms.f-static.net/uploads/4491153/normal_60503d8f8645f.pdf
    • https://cdn.sqhk.co/tipusuzog/JXic3Gi/transmission_fluid_pump_kit.pdf
    • https://cdn-cms.f-static.net/uploads/4387428/normal_605d974d0d656.pdf
    • https://static.s123-cdn-static.com/uploads/4490123/normal_5ff363a780c73.pdf
    • http://idealsit.space/skyrim_special_edition_manualvnkoo.pdf
    • https://cdn.sqhk.co/duxapotor/iihbEr3/word_puzzle_games_unblocked.pdf
    • http://tesapewuj.22web.org/temario_auxilio_judicial_adams_gratis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_adc2d27fe37f46bfa4653c2be4ae33c8.pdf?index=true
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_257aeac08a9f4ecda50906b860489b7d.pdf?index=true
    • http://zovawawopo.rf.gd/97102175679.pdf
    • http://worined.epizy.com/lozugu.pdf
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_ab7ed1cb73fd44238cc01fbe15d11a01.pdf?index=true
    • http://bajisop.rf.gd/43197534866.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_off00011df1.bin
f5a455f195e6a33a1addc11b3b4d48fedb8696fb84e37707f53f50192cb998ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF1 5424 bytes
font_01_sfnt_off00013060.bin
0f961340f7857d2d09216bc6d664039d0e0145c7a0a7da33502008e14d80c037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13060 11728 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.