Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ef976faf05c020…

MALICIOUS

PDF

72.1 KB Created: 2021-02-23 22:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c81cf5504f5106e9d1aab01fb769722b SHA-1: 93103730c91697f3a76b70ea2511203433fb0518 SHA-256: 32ef976faf05c0202d1335b6a62825e509ec16a9834a2f0a1ee9064da44f462c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains numerous external URLs, many of which are hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and the presence of embedded URLs suggests an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://maypoin.ru/strik?utm_term=best+photoshop+book+for+beginners+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fd03928e5cd1.pdfIn PDF document text
    • http://nofosofeze.iblogger.org/jamipegaganafujivi.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/61949819191.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/Zjjjggq/rexugebadapiwowanilejizi.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/jdjchou/art_gallery_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/qibw3uj/kudin.pdfIn PDF document text
    • http://pabixigenived.22web.org/riwidugesom.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/enjiqgj/kefuloluzigexuxiveno.pdfIn PDF document text
    • http://tivulaxovena.22web.org/hernia_inguinal_anatomia_quirurgica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_6013bc72f0eb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403940/normal_5ff7a717d0520.pdfIn PDF document text
    • https://cdn.sqhk.co/pivoledofag/fheHujh/59904273170.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/gfjjh8S/classic_games_100_games_kmart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_60089cfd22a64.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/ckvDSje/door_kickers_2_release_the_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lalukegadugubu.epizy.com/challan_form_32a_provincial.pdfIn PDF document text
    • http://sumidemeg.epizy.com/punarakugupoju.pdfIn PDF document text
    • http://toxodetu.rf.gd/vebamob.pdfIn PDF document text
    • http://nebovorem.epizy.com/sakawogowu.pdfIn PDF document text
    • http://golujaxi.epizy.com/dimenupumik.pdfIn PDF document text
    • http://zusutifosaj.rf.gd/phanteks_enthoo_luxe_2_tempered_glass_review.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_off0000dd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD16 5312 bytes
SHA-256: 00822ba8ff4031d012b6e7711ad11445e47df96c4a577d0384cf026f4d0b87a5
font_01_sfnt_off0000ef23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 10536 bytes
SHA-256: 9e4ef07f1a6b19401eb980fcdf106e5122de2765b5fd730881b01a4b751479b6

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