Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3b1413a0ab02e3…

MALICIOUS

PDF

73.8 KB Created: 2021-03-31 23:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6bfcf075572d12939646f365adf19bd5 SHA-1: 15c1bca80130b8cc1211831f1d2b2c2a2d0a6849 SHA-256: dd3b1413a0ab02e373f3a3099737bc939a3ebca10057d4d990542eeaf8763db5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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
  • 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://botokaw.ru/strik?utm_term=air+force+1+pixel+white+gold+chain PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426090/normal_6034c8fc6d4f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ffc81cfbf20e.pdfIn PDF document text
    • http://torixewiser.medianewsonline.com/samenovidurimidufada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_603a1363c527a.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/6174198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_60430395b3966.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/95886521964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5fe8b57c6d6d8.pdfIn PDF document text
    • https://gidipefodato.weebly.com/uploads/1/3/5/3/135348522/91c98.pdfIn PDF document text
    • https://kaxuzemerufo.weebly.com/uploads/1/3/0/7/130775382/5665712.pdfIn PDF document text
    • https://dupukaradox.weebly.com/uploads/1/3/6/0/136015529/fizepadiloduno.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/hLxichc/idle_landmark_tycoon_hack_mod_apk.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/4231457466.pdfIn PDF document text
    • https://lovapunosarimol.weebly.com/uploads/1/3/5/4/135401421/760ed8.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/eGTiedf/leather_jacket_outfits_2020.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/1420f69.pdfIn PDF document text
    • https://cdn.sqhk.co/fetogivaw/78vhagg/zombie_district_hack_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5ff8266d8d42b.pdfIn PDF document text
    • https://cdn.sqhk.co/mugodetutag/hjdxgQ0/brothers_in_arms_3_hack_free_download.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/rizixenuve-jageguzil-jutobevowof.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://donijexufenu.onlinewebshop.net/verb_forms_v1_v2_v3_v4_v5.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/child_art_developmental_stages.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_off0000d364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 5228 bytes
SHA-256: 97fd0c1b8d3fc411f7c5f3da16abd0f5fd027e4d12f377c19593f4a3d4d10c16
font_01_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 11700 bytes
SHA-256: 51c3827975657220e5ac953cfb7ea2f28beaa40dc407b6ea1416d2a093ed8f0d
font_02_sfnt_off00010b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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