Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ba01515e0eb573…

MALICIOUS

PDF

80.4 KB Created: 2021-03-28 04:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6a0603dca1e9507ce59759d20edd850 SHA-1: 2ca3ec78ecd02d12c6244b786f9ed62110c48dcd SHA-256: 04ba01515e0eb573f5042d49caf3348a738e85d39d24dbba74265dc0d65c79a2
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 0.9998

Heuristics 6

  • 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 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://gimoguvi.ru/award?keyword=bringing+words+to+life+pdf PDF link annotation
    • https://tikodukika.weebly.com/uploads/1/3/0/7/130776738/kewizo.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/worojut.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/jeifGha/25102045380.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/air_pollution_control_a_design_approach_4th_edition_download.pdfIn PDF document text
    • https://gorixekaliwe.weebly.com/uploads/1/3/4/4/134439057/2593405.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/pdujahf/cake_mania_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/14igcji/chimpact_run_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wokuvaxevaji/iuhdbAd/37111931169.pdfIn PDF document text
    • https://cdn.sqhk.co/gomiwopizi/P1Wxkjf/48258299341.pdfIn PDF document text
    • http://lotupojaxuvutix.mygamesonline.org/53846177472.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/haAVidi/wololo_sound_file.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/phbhbif/33531890601.pdfIn PDF document text
    • https://webapifupa.weebly.com/uploads/1/3/4/7/134706955/7623646.pdfIn PDF document text
    • https://nobezenarevux.weebly.com/uploads/1/3/4/6/134628045/fazuwozinimezavi.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/18773840-4586-4930-93e7-00ef5e97ddd0/83565713245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40f955e-4b11-41c6-b58d-263200cb4189/hp_elitedesk_800_g1_tower_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eca7f83-2b0b-4a0e-ac09-da4524cbcb23/jedi_training_academy_disneyland_paris.pdfIn PDF document text
    • http://povodakav.myartsonline.com/mulenigurogedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b693ce5f-afb8-4010-a8e5-d9ff156b372f/lavogivoredozivopot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d636fa50-02f4-417e-998a-437e2c6b57dd/jitterbug_flip_phone_best_buy.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_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 4928 bytes
SHA-256: 2e049bd6797a9e420c0d053aea5cfbac97f34e17fb7c117a435e921c60425ffb
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 10856 bytes
SHA-256: 130b49124933b7f45205e0558f74fd3c9e7910eb9ff684a23fee383daef14b36
font_02_sfnt_off0001264a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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