Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00c4777b6f84e6c…

MALICIOUS

PDF

81.9 KB Created: 2021-02-26 02:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bcc158af8edc9183efd353db56c0ed33 SHA-1: 3333a910567dc2ee04678e77f4ae7ddf40aaa9ce SHA-256: f00c4777b6f84e6ca6f56e92713885a7ef5a29dd041b02d3657b964e9b9e3556
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as a malicious redirector. The heuristic firings indicate the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=movie+review+template+for+elementary+students In PDF document text
    • https://tefeteti.weebly.com/uploads/1/3/0/9/130969297/faf285fbadf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5fd0491b74034.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/Nbkgghf/76450869970.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/varoxujuzuru-gunozasu-bugeres.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501208/normal_602f8b5380e1a.pdfIn PDF document text
    • http://lidzadva.xyz/drive_in_theater_houston_moolows.pdfIn PDF document text
    • http://kpovli.ru/lonerism_hoodie_for_saleqznk5.pdfIn PDF document text
    • https://doxagazezuzizum.weebly.com/uploads/1/3/1/6/131606815/0a0d6d13f.pdfIn PDF document text
    • https://zanorima.weebly.com/uploads/1/3/4/6/134624551/44591c0925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_600a2a52ba1e5.pdfIn PDF document text
    • http://draiwenstore.online/tefopuvnk5nl.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/ross_carbonite_solo_frame.pdfIn PDF document text
    • http://instapriz.website/91797160908r1qei.pdfIn PDF document text
    • http://allerop.xyz/pencil_drawing_images_easy_and_simplecnm3u.pdfIn PDF document text
    • http://wirelessinfo.ru/kabbage_small_business_loansy9vfl.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/chaSjbR/truck_craft_bodies_dukinfield.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/hcQhjYs/12411521071.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jirabasojexosud.atwebpages.com/degiwikuxilu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 5444 bytes
SHA-256: 4e7014dadd71f3ed952aa017319a0cb04518da9c1a7d1ba910fd180ebfae192e
font_01_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 10548 bytes
SHA-256: a3b11be8c8bbe9d0e53517f620f35ce3b55b0b1f1eac21a0b8ec6fc5d582368c
font_02_sfnt_off00012493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12493 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189

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