Malicious PDF — malware analysis report

Static analysis result for SHA-256 33add094f5d35041…

MALICIOUS

PDF

79.2 KB Created: 2021-03-25 17:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f9b07fea8170e587268615c77563ad52 SHA-1: 739fddca8e1e67f6d588006642a62978179c88ad SHA-256: 33add094f5d35041d57615dfbfc7c9a8328808d94c01165c2a68bfd550d889fa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://maypoin.ru/wix?keyword=murray+riding+lawn+mower+service+manual PDF link annotation
    • http://ginalupajeriw.scienceontheweb.net/brushless_dc_motor_drive.pdfIn PDF document text
    • http://ligoturup.22web.org/list_of_words_that_should_not_be_capitalized_in_a_title.pdfIn PDF document text
    • http://prostosite.site/death_note_movie_2006_cast0w2xd.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/why_does_my_washer_leak_when_it_spins.pdfIn PDF document text
    • http://sekuweb.iblogger.org/87888205123.pdfIn PDF document text
    • http://instofficial.online/what_starbucks_drinks_can_you_make_at_homex5awz.pdfIn PDF document text
    • http://lixidepobejoji.mypressonline.com/creative_writing_year_4.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/5105317738.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/74336095947.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/52752181-7f45-474f-a92d-681290b15640/74322298131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec197ac-d640-4d9b-bce6-d0a6d4816798/fepazulimomujutazitojiwis.pdfIn PDF document text
    • http://seninode.epizy.com/origen_liquido_amniotico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc5276f-d36b-4b5a-9745-696ce5aeab45/emergency_care_13th_edition_chapter_1_test.pdfIn PDF document text
    • http://vodugesivizere.epizy.com/star_wars_galaxy_of_heroes_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936baf4c-2a18-43f1-9655-00c02138a0f0/wovuwuzax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb10f4be-9de9-4b84-8d9c-499d7d6b418b/jeux_de_cartes_a_deux_simple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d56757d-6581-4450-a436-187075cf4a17/ring_doorbell_plug_in_chime_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf22bd21-5517-4b4c-a012-fa21d6430db2/axial_scx10_jeep_cherokee_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32bc9c2a-d522-425c-92bd-6a2fad793348/seven_hermetic_principles_explained.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/how_long_does_it_take_to_cook_a_turkey_in_a_rival_roaster_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb06eb5f-db34-45c2-b0c2-0acb22c423d4/tiluzelif.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/dopowinudamiwikukusiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dda506a-2f9e-4592-b82b-1f3337f8d00e/dozadovanew.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_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 5516 bytes
SHA-256: d2947a999ae2caa66099f7ec664b1cd9cadb54220fb47c4950d166e4820fce6f
font_01_sfnt_off00010a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A51 10828 bytes
SHA-256: 8e539356fbc5dfa21a0fa1b85e381871ad57e1ae4e41462d8f110267b57f1b01