Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe47f5381156a2e4…

MALICIOUS

PDF

72.7 KB Created: 2021-03-02 04:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bdc914ead4d6b0106f46cbc6f280b27a SHA-1: 163f51866d8edbab32b38264d787c52bc9a934ae SHA-256: fe47f5381156a2e48e7cacb02b93cfe49aaaf173ad4d686d3b78aa9983c33dbf
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URLs, such as 'https://botokaw.ru/strik?utm_term=why+is+my+computer+not+charging+my+ipad', suggest a phishing or malware distribution lure, likely related to technical support scams. The presence of numerous links to disposable hosting and link farms further supports the classification as a phishing or scam document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=why+is+my+computer+not+charging+my+ipad PDF link annotation
    • https://nenefifozotuve.weebly.com/uploads/1/3/0/8/130874038/dufew.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/kipotutanulo.pdfIn PDF document text
    • http://helpverifybadges.com/writing_exponential_equations_given_two_points_worksheetgxnwc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477167/normal_6027a870ab146.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/gofewijilemeweg.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/honda_passport_review_consumer_reportsnaxn2.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/how_to_reset_a_well_pressure_switch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447098/normal_603a4266b71db.pdfIn PDF document text
    • http://egosikenclub.com/ant_video_er_plugin_for_chromerptdu.pdfIn PDF document text
    • http://afracheat9.xyz/los_reformadores_protestantesq276b.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/giMq6hj/beviwesigebomeradupuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5ff5bb1f45b36.pdfIn PDF document text
    • http://cashbackk.site/richmond_water_heater_instructionsrl484.pdfIn PDF document text
    • http://espaceabonne.com/my_talking_tom_2_softonicbu3qd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepofif.onlinewebshop.net/galaxy_dx_959_power_mods.pdfIn PDF document text
    • http://baxewape.myartsonline.com/runapisobukobexetegib.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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 5572 bytes
SHA-256: 7f57f7fc3471cdcdd4fd6bbff541adef6b16ace29b16b0a26c4e7a68114f18b5
font_01_sfnt_off0000f162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 10720 bytes
SHA-256: e5a1b21b59d9e9b2ae07ae88e56da776f39e52188f6c9af55d1033e469b2451d

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