Malicious PDF — malware analysis report

Static analysis result for SHA-256 3044d4c08d730cf1…

MALICIOUS

PDF

85.4 KB Created: 2021-03-19 09:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 83830526b8d7fd8f63078a65857586a8 SHA-1: 966e13360cb2607c818817f826398dd714abf241 SHA-256: 3044d4c08d730cf17f73fc7a6e57e0492db849d3e3360da877c9cc6a388d1090
66 Risk Score

Malware Insights

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

The ML classifier and PDF heuristics strongly indicate malicious intent. The document contains numerous embedded URLs, with one pointing to a suspicious domain (`botokaw.ru`) that is likely used for phishing or malware distribution. The presence of a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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/aws?utm_term=pl+sql+developer+resume+7+years+experience PDF link annotation
    • http://copyright-supporthelp.com/92065767135t77p6.pdfIn PDF document text
    • http://teenagetutor.online/cribriform_plate_anatomylnybi.pdfIn PDF document text
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/timifupozujiteg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448750/normal_6026160c42bf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_5fed7c04c56a3.pdfIn PDF document text
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/3443845.pdfIn PDF document text
    • https://lopufofogepuxal.weebly.com/uploads/1/3/4/6/134695200/130803.pdfIn PDF document text
    • http://1eyvgo.xyz/how_to_play_poker_at_home_with_moneyjl7ug.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/mezinus.pdfIn PDF document text
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/5bd281b007.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/figoz-rezefuna.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/4092074.pdfIn PDF document text
    • https://wotakowa.weebly.com/uploads/1/3/4/8/134885303/wowifizari-jomuvijedirase-mexefumuzelob.pdfIn PDF document text
    • http://vrestoran.info/hey_soul_sister_uke_chordskzred.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/5768ac7e-5e0a-4037-ba24-3a4697290f95/kuwazodanimolobapenunak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc5437a-a0db-408b-85d5-6c46fd6e4806/dibevevebanedaje.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/icosahedron_pattern_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f205df-6515-4414-bab5-476dab29e74c/maxi_cosi_mico_ap_2.0_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/96489734602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ce32f2-7a50-4484-94e8-50839e0f55f5/technicolor_tc8305_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/gemavimikelodowixufoxoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/xafokoz.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_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 5456 bytes
SHA-256: 7ead2c90186a47a73ee7d6063f1b5aabe2939431491c1eb670881347964f1d79
font_01_sfnt_off00011645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11645 10476 bytes
SHA-256: 8c2659f973e7b02ae8a8cad55c9f88a7b98ae7c089b9cccbdd8c7b11ae48bf75
font_02_sfnt_off000139ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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