Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c704d9faccd1afa…

MALICIOUS

PDF

82.7 KB Created: 2021-05-02 09:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 92f80123893af513d2cdd1c48144083c SHA-1: 2896a4ae20d467ac99922010f70541475ca16bfc SHA-256: 6c704d9faccd1afa3e54fb5b1651a965120ab0abed3b337eaa124c2710fe6ecd
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 0.9996

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://ponafet.ru/strik?utm_term=perdona+si+te+llamo+amor+2008 PDF link annotation
    • http://peluxuba.sportsontheweb.net/74505115910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_60312c5d34bb1.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/hwMIV7C/xibudasulavoren.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/cmkS3oV/goxapoxoforulonamuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/MFPZbgj/48854409544.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/ifijhin/19639921583.pdfIn PDF document text
    • https://cdn.sqhk.co/lakanodip/7tidgcz/red_white_and_light_blue_horizontal_flag.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/minafewomigazok.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/hfjccgj/tagatoxonedefawadufupiki.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/fsMv4PG/zelonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_6058e5bc7882b.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/Mhbgcjd/super_smash_bros_adventure_mode_dragon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fd1441102332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_605fa01b9e995.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/body_movement_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_603cecfbe4971.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/pukagabix.pdfIn PDF document text
    • https://cdn.sqhk.co/tugirujozi/MjcXgho/kindergarten_math_skip_counting_worksheets.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
    • http://zisafaziga.epizy.com/articulate_storyline_3_full_version.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/calendario_sep_2020_mexico.pdfIn PDF document text
    • http://gofabudif.epizy.com/zufovukuze.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_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 5228 bytes
SHA-256: 2edcfab306a92b3effd23eed487fb3e9bc185cc87c80bacd1362e00f6b2f32d5
font_01_sfnt_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 12088 bytes
SHA-256: 640c57c8a3a1449ad7ea6e6304ca12284baa0e181a4edce4c62cd5a7ed50eec5
font_02_sfnt_off00012d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D31 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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