Malicious PDF — malware analysis report

Static analysis result for SHA-256 60003296f79f3cdb…

MALICIOUS

PDF

82.8 KB Created: 2021-06-09 09:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e87b79282826626c182da2488baffae1 SHA-1: 2f13f62b7b41b12187ca6b410b4d65f8436a4850 SHA-256: 60003296f79f3cdb6ff2d2f8601eea360bb639b07f823bb025a46f3af2b60066
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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 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://inwebjor.ru/pbw?utm_term=my+hero+academia+heroes+rising+watch+full PDF link annotation
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/fbb23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409096/normal_60271a5a322ea.pdfIn PDF document text
    • https://vixananuxa.weebly.com/uploads/1/3/4/8/134881407/xilalixow.pdfIn PDF document text
    • https://xunimolozabipos.weebly.com/uploads/1/3/2/6/132681728/6872362.pdfIn PDF document text
    • https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/sozozebekakenubakupu.pdfIn PDF document text
    • https://bexajaburise.weebly.com/uploads/1/3/5/3/135345802/2142081.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/9804255.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/3386437.pdfIn PDF document text
    • https://jixerunoxeza.weebly.com/uploads/1/3/4/6/134678785/8158634.pdfIn PDF document text
    • https://jaxumemiri.weebly.com/uploads/1/3/4/4/134465633/rewugezetasukuzawup.pdfIn PDF document text
    • https://dolufinome.weebly.com/uploads/1/3/5/3/135330980/89a3883c3c0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474465/normal_6000e9640119e.pdfIn PDF document text
    • https://zavadogo.weebly.com/uploads/1/3/4/3/134325895/4414923.pdfIn PDF document text
    • https://kumevilowe.weebly.com/uploads/1/3/4/5/134598600/zawasinudaxebidif.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/9792092.pdfIn PDF document text
    • https://voxujoponita.weebly.com/uploads/1/3/1/6/131607404/18a266f2ab9.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/xijujawupov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_5fdb31a227891.pdfIn PDF document text
    • https://zafolixoniwalo.weebly.com/uploads/1/3/5/9/135958226/3877769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e1c9ea-4bc3-4e8a-8242-7ca4a214231c/what_is_an_economic_impact_payment_check.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d74742-943d-443e-9973-2d397db6bb2b/how_to_use_incentive_spirometer_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98ef122-854e-4bdc-a3b2-811716582b37/are_the_national_museums_in_dc_open.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9b39d7-df4c-45d9-bc51-ef8fe90d9621/which_fitbit_is_best_for_me.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 3752 bytes
SHA-256: ddc42a95f06783a5a4201049c6177a9ee559787c9621ac86dd7408d154010dd1
font_01_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 5636 bytes
SHA-256: 871a154e7d715b39d5e415601190460f66270ba16ce47e48b10461fcb95d8827
font_02_sfnt_off0001027a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027A 10888 bytes
SHA-256: 58b440b101e9cf5454513f959582eb9fa1e45e8a4675ce482d52978e1138922b
font_03_sfnt_off000127d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 16096 bytes
SHA-256: b116d555496960b1001cf6c696eea8d4db69ac652c8811f9a70fd582a21e1c02

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