Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf72425f829474b6…

MALICIOUS

PDF

82.0 KB Created: 2021-02-15 02:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b91ed2217cbf215f3a759566572fe77f SHA-1: d5c3b85aa08a5e3cb18733741da2fbe221d7ef82 SHA-256: cf72425f829474b63837fe5473283174f343b06319ba09a2ac69f078925595fe
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs likely lead to malicious content or phishing sites.

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://maypoin.ru/wb?keyword=google%20play%20games%20%20for%20pc PDF link annotation
    • http://polfact.site/toyota_forklift_manualtkepm.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/Fwieano/villains_style_vs_princess_style_dress_up_games.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/IjajhFF/game_of_war_fire_age_mod_apk.pdfIn PDF document text
    • https://lipixifafamuxa.weebly.com/uploads/1/3/0/9/130969384/f95c877ab5.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/ijhdjg3/zijerirugafukomivosugo.pdfIn PDF document text
    • https://kuvolobogon.weebly.com/uploads/1/3/4/0/134012650/ruditoziw_valelogolatowot.pdfIn PDF document text
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/wuxasitufowoz-fusorufikoviwu-xewiri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411681/normal_60000bed4723e.pdfIn PDF document text
    • https://datotizit.weebly.com/uploads/1/3/4/6/134696706/711a5b.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/Cifhi3U/28466121308.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/hf9FkPx/harvest_church_riverside_ca.pdfIn PDF document text
    • http://auth02mobility.com/electronic_music_internet_radio_stationsval2i.pdfIn PDF document text
    • https://jufozawuvinuxak.weebly.com/uploads/1/3/5/3/135326647/wefakefi-mejamo.pdfIn PDF document text
    • https://piminudoligot.weebly.com/uploads/1/3/4/6/134688392/xogedonireluzudi.pdfIn PDF document text
    • http://selectgetc.top/ball_drop_live_stream_2020_chicagomu1zx.pdfIn PDF document text
    • http://getsol.xyz/xadapofabekovunotolimofmd6ga.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/higcgdu/ravipow.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/igdlpha/cool_baby_boy_names_that_start_with_a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382962/normal_60063534ea805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 5468 bytes
SHA-256: ff1a48371f9fbb5374db9ce63b3638cb97a16945063b78ad446dabc515cbca9f
font_01_sfnt_off000115a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A9 10472 bytes
SHA-256: 0aaa64a3e0e94d36e3620e8d3b7ec0dd8ef16e74e48f03afeefc79c25f5a4d40

Open this report in the interactive analyzer, or submit your own file for analysis.