Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c52edd344056afa…

MALICIOUS

PDF

76.7 KB Created: 2021-03-17 20:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88c33ac8eaad4df35831777bc78dd233 SHA-1: e6d5dca5e5fa2bbd5bc0c0b21f53da385cfea3ae SHA-256: 9c52edd344056afa25575d6dbee5bea9dfa1fe339023f7fcbb4d61a2a20a30a2
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 0.9997

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://botokaw.ru/wix?keyword=social+psychology+dictionary+pdf PDF link annotation
    • http://puzofogerexiwi.22web.org/harnett_county_inmate_population_report.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/m5EfVgh/alien_shooter_galaxy_attack_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/gcihyff/lafoziwopedi.pdfIn PDF document text
    • http://litazil.22web.org/black_and_decker_food_processor_reviews.pdfIn PDF document text
    • http://lamawedetuburut.iblogger.org/josobegav.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/jdWshga/jomula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezajezo.epizy.com/rodakifebepelaripajalove.pdfIn PDF document text
    • http://puguvapalovuzub.rf.gd/lejuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062aa4f1-1922-49a4-8ff2-039570049c4c/sanejawaw.pdfIn PDF document text
    • http://zenijesadimikig.rf.gd/molopigu.pdfIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_537ab7ffe6fe4c85ae11c3fcf775f8e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a090cfb9-8bd4-42fc-b26f-bb288c4a287e/tufuvorajawenapozano.pdfIn PDF document text
    • http://menivafanar.epizy.com/kotad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e707f900-d704-484f-b834-461e51d86970/how_to_install_sims_3_expansion_packs_without_origin.pdfIn PDF document text
    • http://suwetiwojiza.rf.gd/what_kind_of_poem_is_the_raven_by_edgar_allan_poe.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_fb0f8b35bb334d328fa5c192ccddf96f.pdf?index=trueIn PDF document text
    • http://vemefosa.epizy.com/58634233304.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/befikre_movie_songs_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c012245-cad6-48be-996a-beee163ad8fc/98886427373.pdfIn PDF document text
    • https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_ff52ae8daccf41e3b342e34cfbe4ab36.pdf?index=trueIn PDF document text
    • http://sabuxixu.epizy.com/alpine_halo9_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_off0000f09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09C 5620 bytes
SHA-256: fcbf1bcd6e2ed590c37ceb83dbc0392cca2a54970d581b84ae940b3ab557d96e
font_01_sfnt_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 9884 bytes
SHA-256: 162709eaf4083813ecc82152e105759621531ce53b7a4f23deb5c0ce34ad218e

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