Malicious PDF — malware analysis report

Static analysis result for SHA-256 0832edac6a785c5e…

MALICIOUS

PDF

90.5 KB Created: 2021-05-06 02:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bd9804ffd6b80a41dc708b99934f3286 SHA-1: 2ca181e6b3bc7f94d67b1ab95c88e1a765680208 SHA-256: 0832edac6a785c5e49e8a5cf8fe730e1a7d35c8bcc4fb9fb423946714d49c9b8
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML model, and contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The embedded URL `https://soxebez.ru/strik?utm_term=does+costco+sell+decaf+coffee` indicates a phishing or scam attempt disguised as a search query. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or content-scraping attack.

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://soxebez.ru/strik?utm_term=does+costco+sell+decaf+coffee PDF link annotation
    • https://cdn.sqhk.co/gozolosew/XKbnagj/15683556368.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/jYhijic/taronabutofutikikeza.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/novokegalan.pdfIn PDF document text
    • https://romidawuro.weebly.com/uploads/1/3/2/7/132712233/fisugijugizagure.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/fhaPjj7/79257191466.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/act_math_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/2jghVij/guide_snake_io_worms_zone_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/jfTiguA/oxo_spiralizer_target.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/equidad_de_genero_en_el_deporte.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/logic_and_critical_thinking_book.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/one_touch_ultra_two_instructions.pdfIn PDF document text
    • http://sasawavivar.mygamesonline.org/91852467977.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/ehhhd5e/gixeke.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/guvuz.pdfIn PDF document text
    • https://zagavodemutiza.weebly.com/uploads/1/3/0/8/130814258/pivalobuxomasi-pijosovo-towokof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/87095516533.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_9385ef2a0e5b45e6bd73c7025fa85656.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_3876ccd588224c04b5ef4d991e53495e.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001247f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247F 4920 bytes
SHA-256: 878b5fe4f515148eee52009afdf0705f2f60d1c7ef95bc159612673a83845bc0
font_01_sfnt_off00013558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13558 11836 bytes
SHA-256: 3594e2cea42663910886048af1ec274e966b6900d90832c6b5e146414a731721

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