Malicious PDF — malware analysis report

Static analysis result for SHA-256 814e774785e51559…

MALICIOUS

PDF

80.2 KB Created: 2021-03-15 11:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cc10e55044754dc134aeacff928365e9 SHA-1: 558b660633c7dc8c39ca6d10c3978d27af9f0b5d SHA-256: 814e774785e51559a0bec7e6ea9407fa9a2c4eb0e3e8a4dd27530c51b54d538d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=ap+world+history+chapter+18+reading+guide+answers PDF link annotation
    • http://jepisafidezegun.scienceontheweb.net/zebifetemisidikezapap.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/dDQ9iek/shooting_battle_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xezufulozuwo/fhj3jcn/guide_carve_the_pencil_apk.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/ludosujup.pdfIn PDF document text
    • http://circulshtangcalip.website/gupefirevivojufuro963zo.pdfIn PDF document text
    • http://genusadnlo.space/the_anatomy_of_revolutionck3to.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/dLqflhb/27219499863.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/pavuwisexal.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/ifjibgd/92720703730.pdfIn PDF document text
    • http://numberoone.xyz/how_to_fix_squeaking_ge_dryerxklt2.pdfIn PDF document text
    • http://vladmer.ru/free_printable_synonym_worksheets_grade_3bjkow.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/2c74dce3-cda2-4647-8d62-1be97e031513/16057107168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a5ded2-43ed-4282-976f-5092b3fba309/kebasovexamukukikejeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44f650b-41d7-4dc6-9b9e-76cfd8cda707/how_long_does_it_take_to_heal_leaky_gut_dr_axe.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/87575395646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56e6380-51c6-4771-907a-33bf4b593456/remington_700_sps_review_308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05930e57-aa66-4451-bfce-cfc4ecb1ea8d/whirlpool_cabrio_platinum_dryer_wont_dry.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/sisotolurikibekawerudejez.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/168._excel_sheet_column_title.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd4a11e-d2fe-4ba5-aaac-8cb373313e5a/panasonic_bluetooth_answering_machine_manual.pdfIn PDF document text
    • http://pujumek.myartsonline.com/bavopulavakan.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/holoenzyme_and_apoenzyme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79bc1ad0-c1e9-4400-bbff-c545f91d4543/where_the_wild_things_are_costume_diy.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/41497209969.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_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 5764 bytes
SHA-256: 1efc5976fcdda5c72cd900cbf4e86c26cc8bf67352e8ae09ba9f7b7d4430466e
font_01_sfnt_off00010fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBD 10272 bytes
SHA-256: 3454f2711934c068c478c01154ba1693fe5d2854c5005575833f6bfd7bd43dcb

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