Malicious PDF — malware analysis report

Static analysis result for SHA-256 259ee123d046f162…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 06:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7bfb630e72e7ee0a05774eb436d32ce2 SHA-1: 30ef024978212fe2b4e9008194e011475f59ecae SHA-256: 259ee123d046f162bb8351301e813b9056a91d5802c598a61f68a657955b9f8e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as a phishing/malicious PDF. The document body, though heavily obfuscated, appears to be a lure related to job applications. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/award?keyword=cover+letter+sample+pdf+for+job PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412382/normal_5ff0efe2bc70c.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/dduUaia/tiluwuvowaw.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/eEidThi/al_kahrabaa_x_alsinaat_alkahrabaiya.pdfIn PDF document text
    • http://konifipajig.iblogger.org/43727203232.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/cronica_mexicana_alvarado_tezozomoc.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/RYOu5R2/2575877920.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/maulana_jalaluddin_rumi_poems_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/du3iijc/12018513696.pdfIn PDF document text
    • http://potusowo.22web.org/vixefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_5fd6361d599af.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/LHjgagi/stamped_yellow_icon_pack_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_601e6a843b714.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/5J7jaMy/gopiparat.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/ic0JdUi/light_it_up_song_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5ffa0ed8bc51f.pdfIn PDF document text
    • http://ponexikid.22web.org/aktu_carry_over_date_sheet_2018-_19.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/egdSwLJ/lenebijezitirugoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fdb7da1ed5f8.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/MJssHge/70923736913.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_6003be74d82e0.pdfIn PDF document text
    • https://cdn.sqhk.co/dozelodet/hdaksha/all_electronic_components.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449990/normal_6004deb2092d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pitigapevede.onlinewebshop.net/the_boy_in_the_striped_pajamas_book_trailer.pdfIn PDF document text
    • http://wikeratofi.epizy.com/classes_in_java.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_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5368 bytes
SHA-256: 012ce07c57b7418d1da01c8549d45a5613844cfd887ed03d28aeeebdfeca4cad
font_01_sfnt_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 10848 bytes
SHA-256: e32aba20921055ba6a2a5bdb8a1e53ae1fa874fcd4d3fba039ab865a036a593a

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