Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d26cf349bac958f…

MALICIOUS

PDF

124.2 KB Created: 2021-03-10 18:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 921e25d86c69b0aa81100956e786058e SHA-1: 389cec80e10fc6df117f02f54c60d94bd425cdad SHA-256: 7d26cf349bac958f2770c5dd95dce74a76a08bf82afe3126674fa9387b7e53ca
194 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware. The document's content, presented as a worksheet answer key, is a common lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/wix?keyword=dominant+and+recessive+traits+worksheet+answer+key PDF link annotation
    • http://moxegelubopidi.sportsontheweb.net/78438638962.pdfIn PDF document text
    • http://xagelofitu.22web.org/75112706407.pdfIn PDF document text
    • http://teaapple.space/road_racing_boots_reviews87prq.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/tanatologia_forense_tipos_de_muerte.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/abrasive_jet_machining_report.pdfIn PDF document text
    • http://businessoutsourcing.info/zinepoponno01.pdfIn PDF document text
    • http://papotupeti.iblogger.org/how_to_enroll_in_direct_deposit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_a49021da80534df58141682fa9e99ae7.pdf?index=trueIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_753704dfc7c446fea3c942a9a541b84e.pdf?index=trueIn PDF document text
    • http://mutodilevo.epizy.com/serikepiviv.pdfIn PDF document text
    • http://dunuruzofugavix.rf.gd/99156348136.pdfIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_47b131505f7e40c5ae578370a2c289a5.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_0c3e780e03e7489ca38cd5d15109f02b.pdf?index=trueIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_5fa5630901f747b8916709e3a9dff8f1.pdf?index=trueIn PDF document text
    • https://be8d9ae9-445e-4c8e-be9d-a08f5bb2c2ca.filesusr.com/ugd/8b97dd_ca0e0f84eae94794a07eaf90da4d8841.pdf?index=trueIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_6abd5d4afd3140b398b252af5b664c6b.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_68ef4ec8fefc4f40bc75ad4e3a2d1296.pdf?index=trueIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_44411cb26ab94759abd059ae019574e7.pdf?index=trueIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_ba46732ae8034fd28c42498fe6127d3d.pdf?index=trueIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_5714bd971ebd4c2ebf43588f4207c373.pdf?index=trueIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_01acda08b3f34ac08e3ee531caabbcfe.pdf?index=trueIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_4af38ca90e84494cb44abcf1a0873754.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E03 5252 bytes
SHA-256: 01e2b65a10270d84bce64a5feeb1ba1780d2cfbf7e52fab206bc8eaa22f27e23
font_01_sfnt_off0001afbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFBF 10684 bytes
SHA-256: c7fe0fc3ef9141345462d7e0b978fc9b99e061cffaaa4df9a72f7374fb5d2ebd
font_02_sfnt_off0001d42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D42D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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