Malicious PDF — malware analysis report

Static analysis result for SHA-256 676fe596e5933b77…

MALICIOUS

PDF

80.2 KB Created: 2021-03-29 18:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cc73142d2b47a3f14e72af14d5569a2c SHA-1: c420708b93af263d5b87f5cf5e850f021109e9de SHA-256: 676fe596e5933b7757bbf21d77bf249015a3749df292922f8b4588f110cc53ca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://seumenha.ru/strik?utm_term=raingutter+regatta+rules+2019 PDF link annotation
    • http://nozekem.iblogger.org/smart_bp_hr_bracelet_user_manual_m4.pdfIn PDF document text
    • http://vsedlyatebya.xyz/bfg_movie_in_tamilrockersnmxnt.pdfIn PDF document text
    • http://ideaita.fun/saturugosutofixisotedfgqve.pdfIn PDF document text
    • http://smilex.club/bobcat_manual3701n.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/4afef7af-e5b7-4534-a778-be9912ee022b/what_organisational_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cdf1dd-d3fb-4fa4-ba0a-d54888577040/6694539219.pdfIn PDF document text
    • http://bidemuv.rf.gd/pasudedizupebibapivi.pdfIn PDF document text
    • http://kivekovojador.epizy.com/aleatha_romig_convicted.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/causes_of_the_american_revolution_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7cad264-caf3-458b-8ac1-00e112cd8d87/12643582521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36843abc-38ba-4632-a803-61b14d064374/how_to_change_the_battery_in_a_liftmaster_garage_door_opener_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/does_xfinity_have_home_security.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/44192260887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b99e33-ec48-453b-8db7-9fcdb9d973ee/four_heroes_of_palmyna_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9567e7b-07ea-47e1-8e12-76e809f5535d/65179848679.pdfIn PDF document text
    • http://kukipugewogedid.rf.gd/programming_in_c_reema_thareja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb29e18-4d60-4e11-8ccc-8bf9e153fe40/blue_jackets_roster_2020.pdfIn PDF document text
    • http://gutuxujerulobed.epizy.com/66947243401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0e6e1e-f028-4346-9472-da6411c9206a/good_essay_topics_for_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8408f3c2-0c97-495e-be3c-6d580fa4a863/datogumoxikavulonipuru.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/47033934893.pdfIn PDF document text
    • http://pemuginikuj.epizy.com/calligraphy_exercises_sheets.pdfIn PDF document text
    • http://vutekumini.epizy.com/guide_to_writing_explainer_video_script.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF472 1528 bytes
SHA-256: 8678461a36318f73caa47be7720532798183d8a18b717e055a12ae2b3be44fb2
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 5340 bytes
SHA-256: 61289ffa2bc729328a1d3637cb4fa6146780e079543a3c91d6345648ec6a19cd
font_02_sfnt_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 10700 bytes
SHA-256: 0434beb39a4f01ce50cbf5089637d3a445a623fad874906b68a76ae5f478e9df