Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44b22b644ba49fe…

MALICIOUS

PDF

70.6 KB Created: 2021-02-20 19:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 95e159fe1cfedfe1f196f4af0eb7490a SHA-1: 0e6d8e614107c88ce27aa9155017b4e1ae76be90 SHA-256: a44b22b644ba49fe511f8466a649338b123051f36da7fefe6eaf958555fb9d85
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many of which point to disposable domains or known redirector infrastructure, suggesting a phishing or malware distribution scheme. The presence of links like 'https://crophysi.ru/123?utm_term=blackberry+classic+review+2020' and 'http://vipmanmarket.space/aashiqui_2_tamil_song_videozt7pu.pdf' strongly suggests the document is designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=blackberry+classic+review+2020 In PDF document text
    • http://vipmanmarket.space/aashiqui_2_tamil_song_videozt7pu.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/bubidikovak_rinexes.pdfIn PDF document text
    • http://begdas.fun/tisijupatimagh18x8.pdfIn PDF document text
    • http://fitdieta.com/hungry_shark_hacked_version_apkmigjv.pdfIn PDF document text
    • https://xejigidusulup.weebly.com/uploads/1/3/4/7/134730122/ed4ff9da70.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/tnjfEE2/33633689979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_6021629d797ec.pdfIn PDF document text
    • https://lipixebuz.weebly.com/uploads/1/3/0/7/130740586/nuwapari_xosamutenibejo_lafevilekuze.pdfIn PDF document text
    • http://salea.site/21942530048dy5o2.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/9105137.pdfIn PDF document text
    • http://1eyvgo.xyz/free_wheel_of_life_worksheetrdmfx.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/ejdiijc/skywars_minecraft_map.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/Qjdndha/blaze_and_the_monster_machines_cake_toppers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446263/normal_5ff05eb9b9eb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://forums.crackberry.com/showthread.php?t=1178969&s=ede4482a84d97df7417b2b1721a7f84b&amIn 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
    • https://forums.crackberry.com/showthread.php?t=1178969&s=ede4482a84d97df7417b2b1721a7f84b&amIn 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_off0000d6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A6 5576 bytes
SHA-256: d6583c2f00967f8c4eeb95ec4ea6e5d920a1b1ca1c29a4bee7693e4863bd81c8
font_01_sfnt_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 10452 bytes
SHA-256: 1fe83f54c9a3e782cfb42beb5c7d34aaf9ede4576dc6efa4d2236033766f5be2

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