Malicious PDF — malware analysis report

Static analysis result for SHA-256 02af883e3935bad4…

MALICIOUS

PDF

80.1 KB Created: 2021-03-24 03:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c169e506e4b4dc53032b5d75248ae3ec SHA-1: b92c0bcf5897adb3f74e821c7a19cadf87fec4dc SHA-256: 02af883e3935bad46379eaa36ab2285ea209c84010c5d175cbfc56359e60a4a0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful sites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

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://druttle.ru/strik?utm_term=scarlett+2i4+2nd+gen+driver+mac PDF link annotation
    • http://italywow.pro/action_verb_and_linking_verbs_worksheetd9dkp.pdfIn PDF document text
    • http://idealica-ituficiale.website/13058120141x6x3s.pdfIn PDF document text
    • http://kfcrabota.ru/ruludojumofowevuvafawc5kuw.pdfIn PDF document text
    • http://koreanluxe.com/tyt_th-7800_programming_softwareyu1at.pdfIn PDF document text
    • http://keniworu.mywebcommunity.org/knowing_god_bible_study.pdfIn PDF document text
    • http://abanca-electronica.com/how_to_write_an_expository_essay_thesis403o1.pdfIn PDF document text
    • http://spencermcman.us/cairo_tourist_map7auzh.pdfIn PDF document text
    • http://vnds-v.website/definition_of_corporate_strategic_planning_process_involvesfs20s.pdfIn PDF document text
    • http://mihetos.xyz/240892066562qii1.pdfIn PDF document text
    • http://lightsex.ru/how_to_use_a_bissell_powerforce_powerbrush8j6xi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepawomokatuke.myartsonline.com/48607883934.pdfIn PDF document text
    • https://6d1a2d78-ebd2-4140-94a0-411197be5b5f.filesusr.com/ugd/88ff89_fdc4755129f04dec8333f351732c130b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/fbise_date_sheet_hssc_2019_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae286571-9fb4-44de-9269-822098726fd4/7772343345.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/why_electricity_and_magnetism_are_related.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_c5c23d86e25846f3b249a4aea136b5b5.pdf?index=trueIn PDF document text
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_d4a573d564414ea9b1f79ed20acb7d32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/348bdd17-a8c8-495c-a307-cf60d9cd4572/beripin.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/lewibajusosumovo.pdfIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_5a78909641844bad9537e64405b965eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/254284b1-97aa-4ede-896b-116f428da18b/how_deep_can_you_dive_with_padi_open_water.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/bottom_bracket_cable_guide_specialized.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5887efab-a581-4bf9-96e5-df56d78ff55f/how_to_clean_onan_4000_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1892f4-b43c-4fde-a1ee-8a1313d42355/hp_laserjet_cp1525nw_color_printer_wireless_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/cisco_ccnp_route_lab_manual.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_off0000f995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF995 5464 bytes
SHA-256: 66004167edbacda094ec65a6c8cc80d873c18f85609531acae0c28d455160883
font_01_sfnt_off00010c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C27 11732 bytes
SHA-256: 410e05f28916de3ec5d4dfd3fb8acbc881dd68e0f0b462b25fab58001009a821