Malicious PDF — malware analysis report

Static analysis result for SHA-256 968d02ded9ef0339…

MALICIOUS

PDF

76.8 KB Created: 2021-04-06 00:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2c328ceae461b584221e1621e037ddc6 SHA-1: 70e1890afb8d165e7f0c793fec2e87f64b083e67 SHA-256: 968d02ded9ef03391f8de89f74494790b5cd2e617aa46b7fec3cfd7c08097f22
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=basic+concepts+of+organic+chemistry+pdf In PDF document text
    • http://gojovujewinunuj.mygamesonline.org/american_journal_of_agricultural_economics.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/97816440930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5ff40280a6dbc.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/5156002.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/gfYhcjf/zulerewo.pdfIn PDF document text
    • http://sodebalolubos.iblogger.org/history_of_python_programming_language.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jaiiebL/63826125445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_6030447ecedaf.pdfIn PDF document text
    • http://dubotivuga.22web.org/8080059733.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/3592815.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/fcghy9Y/501_free_new_escape_games_2_level_135.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/uliKZic/talifebugavitinisob.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/gg7jjCF/my_talking_pet_apk.pdfIn PDF document text
    • https://rusaxexuratibu.weebly.com/uploads/1/3/2/6/132680860/4c67611e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475716/normal_602f0229c4678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f2fce46d-656a-4c49-bf19-cfa6bef699a4/what_does_from_dawn_to_dusk_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d11e617-e3e1-4407-8af2-713f82f98f03/casio_f91w_rose_gold.pdfIn PDF document text
    • http://nifuwisenomu.epizy.com/fazobufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5866b578-e694-4901-845a-3af0e33aa1d5/16865947467.pdfIn PDF document text
    • http://tekurowiki.rf.gd/sajikonubalokajawetagel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 5476 bytes
SHA-256: 8fe6fddf552736fad1799b514e1b1884c0b2b0b3715478fe672981474502fece
font_01_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 11244 bytes
SHA-256: fab037f8bb749c1d34c0814eb508c47381bbeadadc2772759b1292e3f21b8c44
font_02_sfnt_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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