Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c846f59370d4b6…

MALICIOUS

PDF

80.6 KB Created: 2021-04-26 18:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 86798de31d279eff620bc1bd2fa0b843 SHA-1: 969332baa1ae0df5b7e32d2ba76b424ff548437f SHA-256: 96c846f59370d4b617c7ab8fec40e7d4d8a5f15de7b28850d814b97e9ea6d6c6
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of obfuscated document body text and embedded URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=c%25C3%25B4ng+th%25E1%25BB%25A9c+t%25C3%25ADnh+th%25E1%25BB%2583+t%25C3%25ADch+n%25C6%25B0%25E1%25BB%259Bc+h%25C3%25ACnh+ch%25E1%25BB%25AF+nh%25E1%25BA%25ADt PDF link annotation
    • http://pelinebaj.mypressonline.com/navy_seals_army_rangers_marine_recon.pdfIn PDF document text
    • http://zozitaze.mypressonline.com/html_string_to_nodejs.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/idqgjfV/pewdiepie_minecraft_world_seed_pe.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/8bb754.pdfIn PDF document text
    • https://zubajabazu.weebly.com/uploads/1/3/4/4/134466761/1647512.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/list_of_antonyms_words.pdfIn PDF document text
    • http://jarokixepoweso.mypressonline.com/english_grammar_for_ielts_8._5.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/EnWlphb/paintball_usa_groupon.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ihjhhNj/water_ball_jump_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/7136637849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9d4f37-39a4-4e00-80a6-d011b20f8d23/2013_ap_stats_frq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ee8709-7dd6-4a67-bf06-7a1394058ddc/nidulul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c88ded8-0cd6-4bb5-a222-a193d6d44be9/bernard_williams_critique_of_utilitarianism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031c45c1-1021-47c1-b340-71a54dce6d7f/39444292741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87681f16-bcfd-472b-81eb-5eb2dc898106/taco_bell_bean_burrito_calories_ingredients.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_f2c6744191774b86b97b27d4f6e63398.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c008e4a-9328-4c83-adc7-dbf81df22ef3/banasizuzufezabexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e2f52f-d308-4b4f-ba55-167a8f30c823/sijolewojukujexexuren.pdfIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_2289a8a5a17740b5bf40ac7adf723d0f.pdf?index=trueIn 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_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 5864 bytes
SHA-256: 19396d06a23d8af9720fb98cba739e79e0b49b53b1c0f1877ce61d7e373f3185
font_01_sfnt_off00010114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10114 21872 bytes
SHA-256: f22538f5dbdbd93b2b71ee1ae9fd8cb2db439547e9444d2b9919773fb191c82c