Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e908f7f17c42f9…

MALICIOUS

PDF

68.4 KB Created: 2021-03-15 10:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3373b342290a24f17394c3782cacf37f SHA-1: dc8dca321f44ec61e2f56cf9ee294369129a433e SHA-256: 65e908f7f17c42f961146f445e08a703c25e421e304853502ba8be4338c41bcd
186 Risk Score

Malware Insights

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

This 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 pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though partially corrupted, contains text related to downloading an Android application, likely a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=tubemate+apk+2016+gratis+para+android PDF link annotation
    • http://seplafond.xyz/nepaduvovf4uzz.pdfIn PDF document text
    • https://lezuzanufebaj.weebly.com/uploads/1/3/4/8/134873312/1147635.pdfIn PDF document text
    • https://poxolegap.weebly.com/uploads/1/3/1/0/131069824/rizerefewos.pdfIn PDF document text
    • http://trickyturkey.com/bawesawixasifiribuwubopek3e4da.pdfIn PDF document text
    • http://center-about.com/fuwedisi9vnoq.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/vajudekimezesor-tavato-juvopug-numavuvap.pdfIn PDF document text
    • http://prizinsta24.space/daxigufiwefodbc4f.pdfIn PDF document text
    • https://leduzurukidep.weebly.com/uploads/1/3/4/8/134858842/1722736ebd3bb.pdfIn PDF document text
    • http://helplnstagram-confirm.com/le_mythe_de_sisyphe_rsumypdpo.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/7972969.pdfIn PDF document text
    • http://faceit.su/onkyo_rc-799m_programw4c8i.pdfIn PDF document text
    • http://copyrightmediahelp.com/broadsheet_newspaper_dictionary_definition7afms.pdfIn PDF document text
    • http://pokupka.space/xisebaxivxtu4o.pdfIn PDF document text
    • http://robertferrell.net/5506568868rsaac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_53c17ea0c2964557a5bfc90d9919b9d5.pdf?index=trueIn PDF document text
    • https://251b8137-9113-4828-929b-8e44287074ec.filesusr.com/ugd/b0b521_998d21128dac49deac21352cb5fee14e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc577a0-ff83-46cb-9cef-64de06eb1a90/76145494735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376a90cb-23f5-46ae-8342-6708b67971a7/nizinimosugujimefig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4001e156-85b5-4ef7-9ab9-37c0b5395874/pulojudorixalufaxozipuki.pdfIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_3902e094d2ce4dcaa09b47c9ce693d18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0bdec8-5dd2-491a-8dbd-a5067e838033/the_ketogenic_dessert_cookbook.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_off0000cc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC24 5880 bytes
SHA-256: 738f829da9f87b58e85a9869f362f00e403bfd7052e875def8816081d8d27796
font_01_sfnt_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 10484 bytes
SHA-256: e797f7d3d6b0d31d7504d099170727bfdc6014d26f5dc61f297f38636e9be2c1