Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac062b3e73e29a4…

MALICIOUS

PDF

88.5 KB Created: 2021-03-15 19:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b31b5d8064a53dc93474db4eb21d197d SHA-1: aec1488a7826db435e99e5cc47b533812efabc63 SHA-256: 1ac062b3e73e29a4a2e870b194fcde32c109d995815acd26dfcfd708d3a97570
226 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple suspicious URLs, including those with 'login' or 'passport' in their names, further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://bologen.ru/strik?utm_term=english+books+online+netherlands PDF link annotation
    • http://tuzupibu.scienceontheweb.net/most_important_synonyms_and_antonyms_for_ssc.pdfIn PDF document text
    • http://loginwithfb.site/have_a_snowball_fight_in_spanishuz8h4.pdfIn PDF document text
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/kolirofapenit.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/shopsmith_bandsaw_attachment.pdfIn PDF document text
    • http://romeoplanet.club/real_estate_agent_classes_online_texasko2v8.pdfIn PDF document text
    • http://ruwadika.iblogger.org/smart-ups_1500_blinking_battery_lights.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/9580c1710.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/towiwefejatemu-baliju.pdfIn PDF document text
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/jigavato.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/zuwid.pdfIn PDF document text
    • https://kuxorife.weebly.com/uploads/1/3/5/3/135313812/gamimefi_ravaturema.pdfIn PDF document text
    • http://songkfrk.site/valurikizy115.pdfIn PDF document text
    • http://tadurarawi.mypressonline.com/pubaj.pdfIn PDF document text
    • https://puluzoxaxidu.weebly.com/uploads/1/3/2/6/132683087/fesog-pulifuw.pdfIn PDF document text
    • http://bezinawevudo.22web.org/robuzanufuranub.pdfIn PDF document text
    • http://milanomoda-italy.site/uc_browser_fast_old_version5l2of.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/jidujezajake.pdfIn PDF document text
    • https://degewobajobazim.weebly.com/uploads/1/3/5/3/135324790/b8f3d2c.pdfIn PDF document text
    • http://milanomoda-italy.site/76850142779nopjn.pdfIn PDF document text
    • http://jopalebifu.iblogger.org/52570447097.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
    • http://kubomefewofumim.atwebpages.com/passport_renewal_form_2020.pdfIn PDF document text
    • http://mapitixonemo.epizy.com/scorecard_template_for_employees.pdfIn PDF document text
    • http://novoniranalisa.epizy.com/gitalesibisilobeliwirik.pdfIn PDF document text
    • http://vaxilokenifak.epizy.com/14893104413.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/42881741840.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 5036 bytes
SHA-256: 7e2f7a4230430b77a8f3e2d0cacdbbc62bf5a736fb79b9280905eeb41e6f1320
font_01_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 10920 bytes
SHA-256: 72b1cc1d4c52aabfe00409935279e04d06e4530e0185758df06ba69af0531a87
font_02_sfnt_off000130a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A7 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off000145d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361