Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbaacb3699afadf…

MALICIOUS

PDF

80.0 KB Created: 2021-03-24 05:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a23070893537e416d9cfe19257834677 SHA-1: 26f34549505f8c1be99fdd50eb3ef4e252cb65d0 SHA-256: 7dbaacb3699afadfcf5b055801c50c4e74231df54501ee9beb5a889eebd99825
186 Risk Score

Malware Insights

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

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 0.9996

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://dugedepap.ru/wix?keyword=the+giver+vocabulary+pdf PDF link annotation
    • http://setlyb.online/9864690011rwtwv.pdfIn PDF document text
    • http://2gusevshop.space/escape_from_mr._lemoncellos_library_movie_cast0dcaj.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/igkTgiO/evolutionary_psychology_perspective_founder.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/higejb1/20919710398.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/JhiEGif/battle_islands_ps4_release_date.pdfIn PDF document text
    • http://present-mag.ru/xafuvibukadumonuzedexnd3cl.pdfIn PDF document text
    • http://soderenofironev.iblogger.org/4526575152.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/uhaPgjX/fire_alarm_testing_report_format.pdfIn PDF document text
    • http://starkrobotics.org/luzajasiponerifivitetinavzia63.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/ageQjeQ/new_fonts_on_instagram_stories_not_showing.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/aANi2JF/34533191349.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/gdidig5/49516620695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gigezevozaf.epizy.com/15094456521.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_c05a1fd93ab14d5eb4132447217902a2.pdf?index=trueIn PDF document text
    • http://nirazam.epizy.com/6th_grade_math_vocabulary_worksheets.pdfIn PDF document text
    • http://tilulopitajoma.rf.gd/9631120837.pdfIn PDF document text
    • http://nimuwixoxuwe.epizy.com/jotul_f100_stove_review.pdfIn PDF document text
    • http://sazosubegus.epizy.com/nikiz.pdfIn PDF document text
    • http://vanepozimor.rf.gd/kannada_sad_feeling_songs_free.pdfIn PDF document text
    • https://39dd5e1d-a581-41ec-a80f-9e19245c660f.filesusr.com/ugd/c2656d_9d6c1bb8590b4c78bfcabf8a7c97ada4.pdf?index=trueIn PDF document text
    • http://ripofosefalub.rf.gd/sivojekuwosa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 5492 bytes
SHA-256: ba06c49084492abe18ebe3caf912dc59467e3839b90db5f0eb09555daa94d330
font_02_sfnt_off00010cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 11140 bytes
SHA-256: e6348a6e1f811488e81a669b8ddd694553872ffdc14ef914656784b2e0287280

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