Malicious PDF — malware analysis report

Static analysis result for SHA-256 7177f2cb6e8a5234…

MALICIOUS

PDF

75.3 KB Created: 2021-02-21 00:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dfcef64f74b5ddae7519fdc903928e62 SHA-1: c7024a7604c34b6fdd5321f4893cf858c183a947 SHA-256: 7177f2cb6e8a52347b178460d0c697c5511dc99c27e724a8db3ef4c9dad83c20
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of many external links suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=sample+health+%2526+safety+policy In PDF document text
    • https://cdn.sqhk.co/luvutagawata/ihgcjhT/word_of_the_day_today_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/icv0zii/autometer_gps_speedometer_sending_unit.pdfIn PDF document text
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/04fb358f2fd67f.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/0aTKjjW/jarupipulupitijewej.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/Ihbihjg/last_tycoon_actor.pdfIn PDF document text
    • https://cdn.sqhk.co/sewizefaxiki/j3ijdZL/10801245899.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/8804251.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/62438135025.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/ighiick/nemadetit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bubeto/40143955347.pdfIn PDF document text
    • http://zasuzutan.rf.gd/into_the_wild_chapter_3_timeline.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/billboard_top_100_may_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/14948792244.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/nedoretegetixala.pdfIn PDF document text
    • http://koburolamugalo.rf.gd/bedsheet_shop_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/rofosifumakovupuwutinaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/respironics_bipap_s_t_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/cacee_form_asper.pdfIn PDF document text
    • http://fukasutatota.rf.gd/final_notice_debt_collection_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/abhimaan_full_movie_bengali.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 4888 bytes
SHA-256: 89a5d11db130cd9a9dc8378c9e774cd9b1cda9dbb394772d1a0409167ffb8c3c
font_01_sfnt_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 10280 bytes
SHA-256: d576bae124f952f111824be1ab69f861f015e9c0c67bd1d136c8ab7e90d9d48b
font_02_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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