Malicious PDF — malware analysis report

Static analysis result for SHA-256 7801fc032af04b24…

MALICIOUS

PDF

75.5 KB Created: 2021-05-11 23:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bd3222c6709e9dfd6d726ff95b115b84 SHA-1: 043afbf78a0d33ca7fe34a72225a653b7203c163 SHA-256: 7801fc032af04b24e5149579453115ceb94f195d7fe1630e8b19d3273460d6c1
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and known redirector infrastructure, indicating a phishing or malware distribution attempt. Heuristics confirm the presence of malicious redirector links and a link farm strategy. While no scripts were extracted, the PDF structure and URL analysis strongly suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=toshiba+satellite+pro+blink+codes In PDF document text
    • http://smm-target.ru/do_you_need_a_degree_to_be_a_marketing_manager512dr.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/desoredodirusebavasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_60214e34af246.pdfIn PDF document text
    • http://nufapivevavenak.22web.org/xixajoxogedikatix.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/hxjhwhc/just_dance_now.pdfIn PDF document text
    • https://xaviguvugunaji.weebly.com/uploads/1/3/5/3/135313722/lupomadowex_jifaga_xazigopujute_mejot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_6047324362582.pdfIn PDF document text
    • http://you-bestshop.xyz/pit_bike_racing_floridaxnusf.pdfIn PDF document text
    • https://cdn.sqhk.co/janogoxuke/jc1xuBY/mivakavozuk.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/jcPjihe/pugubawaxobelofami.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/FjdyQHM/zazesuxedasesutivubenu.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/41284642301.pdfIn PDF document text
    • http://karnaval.host/kindle_keyboard_3g_user_guidept446.pdfIn PDF document text
    • http://rimka.xyz/bokojaxofigejz0v6z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_606041ca91be4.pdfIn PDF document text
    • http://gozipoxeget.iblogger.org/9319836480.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/dtTjgjc/world_factbook_literacy_rates.pdfIn PDF document text
    • https://vukezozonobobex.weebly.com/uploads/1/3/1/3/131383599/vatajuvefariripu.pdfIn PDF document text
    • http://good-production20.site/14163165835efbrw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tenowuwewid.epizy.com/1207776856.pdfIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/birla_sun_life_wealth_secure_plan.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/56821800539.pdfIn PDF document text
    • http://dufojamimusim.atwebpages.com/tutoriel_dreamweaver_cc_2020.pdfIn PDF document text
    • http://pazalijof.epizy.com/cardioversion_documentation_guidelines.pdfIn PDF document text
    • http://jopipada.epizy.com/vowurinaxere.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_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 5316 bytes
SHA-256: 4a52c036ad23863e6dd6adb256721b3b0645871c5aec6d373e808e8231fc1c3e
font_01_sfnt_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 10716 bytes
SHA-256: d3e78d4d1cb62edd59763f7bea34e5c862b8cb5e61b0df46a56757f5062e65d9