Malicious PDF — malware analysis report

Static analysis result for SHA-256 0886faad9ce4d350…

MALICIOUS

PDF

86.0 KB Created: 2021-04-05 12:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0287b208d2c94eae5461cb03d6ac5bc0 SHA-1: 2f8ee15b02a6cc557cb6a1a7181c768f7c1a2306 SHA-256: 0886faad9ce4d350b911c25103dc898975aa7f70a6bd82a29567fd03178368fa
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which are on disposable hosting and use UTM parameters, indicating a link farm or SEO manipulation tactic. One of the embedded URLs, https://leonvi.ru/123?utm_term=henkel+loctite+577+safety+data+sheet, is suspicious and likely leads to a phishing or malicious site. No scripts were extracted, but the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://leonvi.ru/123?utm_term=henkel+loctite+577+safety+data+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375195/normal_6055142072449.pdfIn PDF document text
    • https://wenakewijota.weebly.com/uploads/1/3/4/6/134611788/jowusemuvibu_gezeduwuv.pdfIn PDF document text
    • https://tumavogadagakep.weebly.com/uploads/1/3/4/7/134721967/xakokumamemupe-liged.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479675/normal_5ffe2607cf1b1.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/filoxesuvisigikog.pdfIn PDF document text
    • https://zupagefu.weebly.com/uploads/1/3/1/0/131070313/ab9840edc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/334e4241-33f4-43f9-a3c8-566e23c1cb4e/breitling_aerospace_evo_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3902a725-f711-4a65-9b25-dd0e365e897a/how_to_draw_henry_danger_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2077dcb4-5208-4f04-947d-852b3cc9a7ed/kivaserobudoxojakodatud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34608478-555f-4b97-b787-48f6d4b6c4bd/47133634646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e6ab51-8b86-40ac-89a6-854822264bca/pupaxixusububopagexomupoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc53c79-fe15-4a9c-83ce-2b87d88c0d6e/nemererorarumigevak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c794fa40-3596-4e0f-a2f8-3563bbed1f34/how_do_i_fix_the_oe_code_on_my_kenmore_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb13e334-2c15-4611-804f-8686883a6ce5/56177660574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa0c175-d3df-4b81-af22-dadfcb68ac72/17_day_diet_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a8ad8b-ef66-4ed3-9237-4f46e35dc289/american_standard_acculink_platinum_1050_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/jikafefasuxujonerawogawol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c896ca6-43b7-4bfc-9da1-06491ed3e383/95014298319.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/nagerivezonajado.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 7164 bytes
SHA-256: ee317acca3cbf4890550a2210d6a786e2d1cac26498b7ba4845bb157418194e9
font_01_sfnt_off0000f775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF775 5344 bytes
SHA-256: e4c35e5529639a5093fa762b8c3ea78c99d1ebc4144987a665176dfe62368f99
font_02_sfnt_off000109af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AF 6640 bytes
SHA-256: 9bd03629031e182ef5d0edf4eb97e2e35a56b166f0173f28f8731b57f1f4cd0e
font_03_sfnt_off00011b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4C 16324 bytes
SHA-256: 14c70da72b14b4386bc99979883f4c8fbf969c3acbafdc6d89faf448d0853d55

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