Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4751bdaaee0e1e…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 09:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fc5e96d37b55e64224da833165ed965b SHA-1: 7c682aafaa8cf6c82f6e80668f7d7af5fa35108c SHA-256: 0b4751bdaaee0e1ee43a3c6d06451bc8b2184b2e9005a5d592e78f7bba294283
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a specific search query in one URL indicates a potential attempt to lure users with specific interests.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/wix?keyword=stray+cat+simulator+apk+download PDF link annotation
    • http://rolopigabetitu.scienceontheweb.net/33027040237.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/FhbAIgf/bitekajig.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/sirijoxufilapekasudole.pdfIn PDF document text
    • http://wide-mean.top/10333695548prw5q.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/71749685519.pdfIn PDF document text
    • http://itactical.xyz/msts_addons_free4mj6i.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/9658656.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/cPgighj/8708713915.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/dsN7bhg/interesting_facts_about_the_main_asteroid_belt.pdfIn PDF document text
    • https://vadisasezex.weebly.com/uploads/1/3/1/1/131163908/5531590.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/mirerixawe.pdfIn PDF document text
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/befure.pdfIn PDF document text
    • http://bestunew.xyz/que_es_la_educacion_segun_autores_recienteszmsq1.pdfIn PDF document text
    • https://cdn.sqhk.co/mobubivifa/dffghhd/76968845194.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/pamubirijisarij-pedunono.pdfIn PDF document text
    • https://texotawumixiwaw.weebly.com/uploads/1/3/4/8/134898612/1985741.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/arquitectura_gotica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0cb04a-9aa4-4f56-a6dd-fc273174481c/how_to_setup_chamberlain_myq_internet_gateway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/838a8e4d-90da-47fb-be04-58fe6cf44a80/how_to_manually_drain_water_from_whirlpool_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee04145-9357-4c96-a8cd-5975098a9218/the_lord_of_the_rings_the_fellowship_of_the_ring_full_movie_google_drive.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/13462843001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000e27b8-79ff-4637-8dfb-5b990d4ecc43/hatchet_book_summary_chapter_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12a1e99-79d2-49b7-99a2-1e21937ca626/davis_drug_guide_16th_edition_used_book.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 5580 bytes
SHA-256: c35bf9ef4d482e6b111407163c862181f3619147464430ea0d0a94f0adf2ec40
font_01_sfnt_off00010a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2D 11084 bytes
SHA-256: 125979f3429df8ddaac45aa06232fd828faa0bf077aaaabe85f2e4a5b6261bdc