Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabbad4aa9dc3516…

MALICIOUS

PDF

91.7 KB Created: 2021-03-30 02:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7f39d5fd2e57d90fcf1f8bb95aa99a75 SHA-1: 4787d3320ef62c6ad926fdef25fefd840f2e7237 SHA-256: cabbad4aa9dc35163cf344d474c8e5bd9219cd9c05a4230792761e91462b0064
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (https://crophysi.ru/strik). The document body, though heavily obfuscated, suggests a lure related to a 'Divina commedia' PDF, likely a phishing or scam attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://crophysi.ru/strik?utm_term=divina+commedia+a+fumetti+pdf+gratis In PDF document text
    • https://cdn.sqhk.co/wokuvaxevaji/iihfD0N/badopebawimupisevenodulev.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/Ggj6Rgj/today_in_history_for_kids.pdfIn PDF document text
    • http://lisipezasuk.iblogger.org/kaxexilijaz.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/Ojagvhh/41524597600.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/cjdk96J/need_for_speed_most_wanted_2005_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/gdjif4l/14837448284.pdfIn PDF document text
    • http://gulenapirexapo.iblogger.org/basic_computer_tutorial_for_beginners_windows_10.pdfIn PDF document text
    • http://dawesave.22web.org/67285601644.pdfIn PDF document text
    • http://gufelujoziwuki.iblogger.org/planetary_annihilation_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/ghikjjU/pale_diaphoretic_and_nausea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/419414ad-506c-4018-8dd2-6d266f314e1b/diablosport_intune_i1000_manual.pdfIn PDF document text
    • http://vefilemegukur.epizy.com/assessment_tools_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/advocate_personality_book.pdfIn PDF document text
    • http://xupewopomiboti.epizy.com/tixutosixovofur.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/62223519774.pdfIn PDF document text
    • http://zetitovafe.rf.gd/nuvimug.pdfIn PDF document text
    • http://rufevobovejexe.rf.gd/janolazabobuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b462be21-ea24-4593-ade5-9a4d40ff9e51/how_to_make_shadow_puppets.pdfIn PDF document text
    • http://luturuwuxas.epizy.com/sikukunowonomadupaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432945d8-bd02-4537-abae-62943102a332/excel_online_training_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69e037b-e367-40db-a007-b26cf646591e/the_natural_rate_of_unemployment_equals_the_sum_of_frictional_and_structural_unemployment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6aeee9-2d67-4b58-922f-66e2c768c3d2/jopopowudepasuxixawipe.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/60474930610.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_off000126d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 5504 bytes
SHA-256: ba092403be70841f9b8d75ac573df294d5a7528bdb000295eec010c6d49a75e7
font_01_sfnt_off00013991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13991 12468 bytes
SHA-256: 4ada762df035d933cdf196c4001442d904d6b0b6c963eb357dafdb984322949b