Malicious PDF — malware analysis report

Static analysis result for SHA-256 b893d1840fd431d7…

MALICIOUS

PDF

77.7 KB Created: 2021-01-27 00:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35dd5c56fc50b434f8eaa7b5f8dae744 SHA-1: a8a2eb276ff51a4d5a129eef54536320d3a3f6e4 SHA-256: b893d1840fd431d7139c9a6c36c25ff41e5e151e9e66416d6767e2649faf73cc
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of the URL 'https://maypoin.ru/wb?keyword=pmc%20property%20tax%20payment%20online' indicates a potential lure related to online payments. While no scripts were explicitly extracted, the heuristic firings strongly suggest malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/wb?keyword=pmc%20property%20tax%20payment%20online PDF link annotation
    • https://cdn.sqhk.co/xafemepino/c2pibjg/zenibixasuvogow.pdfIn PDF document text
    • https://tidukunetubuf.weebly.com/uploads/1/3/2/7/132710673/8481116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5fe18ca6674fa.pdfIn PDF document text
    • https://cdn.sqhk.co/xevoxotasopu/higdtyA/ppg_wallpapers_offline_puff_girl_gifts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5fe109f09d6b3.pdfIn PDF document text
    • https://valefeka.weebly.com/uploads/1/3/5/3/135345526/vudepozutivipor-tiloxenal-gukuv.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/fjc8lph/50654050968.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/KNge56Q/flix_movie_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_6003a89abceee.pdfIn PDF document text
    • https://dujeranisijoku.weebly.com/uploads/1/3/0/7/130776063/6836228.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/hbYEiRH/89566834242.pdfIn PDF document text
    • https://cdn.sqhk.co/vebiziwob/4gfc4m2/extreme_car_simulator_mod_apk_all_cars_unlocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490735/normal_6004beacb528c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480170/normal_5fce758b4651a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458824/normal_5fee1069e2460.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/533342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5ff8930463b92.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/fhbJ9ih/sutopapujejewube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499341/normal_600ce050b0367.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejeseja/puffin_web_browser_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/fallout_1_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/49255532138.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/elective_pci_guidelines.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_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 5072 bytes
SHA-256: 57ce43fe6d402eebfcf8f0fd0d2230dd6588312003daa643f6e4264b7ec1f096
font_01_sfnt_off00010355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10355 10476 bytes
SHA-256: 5e502b5c05d6d4ccaca98d8ae44591658ec7f4d6b0659e007a1d0e679854515c