Malicious PDF — malware analysis report

Static analysis result for SHA-256 73700de79c77e7b5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-12 21:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 447bcc52101f007cd63138092723471b SHA-1: d2ae4185e4944049bd5be3ab5b8c0fc45d4be67c SHA-256: 73700de79c77e7b538cab38039829c72684801edb3cc21994da9e37ef3565896
126 Risk Score

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 0.9996

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=codeigniter+download+pdf+file+example PDF link annotation
    • https://cdn.sqhk.co/fobonelaga/thgjege/23263312866.pdfIn PDF document text
    • http://yourdesk.website/band_baaja_baaraat_english_subtitles_srtc5lus.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/offline_urdu_romantic_novels_free_download.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/bosesomupowufalimu.pdfIn PDF document text
    • http://creamwalls.space/south_film_linkbnk9c.pdfIn PDF document text
    • http://trychambre.xyz/57410102340vnjaw.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/bosch_colt_router_kit.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/vibedetu.pdfIn PDF document text
    • https://wulapoledonuker.weebly.com/uploads/1/3/2/6/132695240/14f214b.pdfIn PDF document text
    • https://zubotovilep.weebly.com/uploads/1/3/4/5/134581484/fasatomagozagijawus.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/hcgeugj/c_c_generals_rise_of_the_reds_cheat.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/nilikab.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/wuziseresoletuf.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/igepChf/digicel_phone_top_up_online_png.pdfIn PDF document text
    • http://oneitshop.info/19261865572dp7cl.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/jigulunalitupilozefitojek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwosotu.myartsonline.com/kokepizorojukew.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/wall_street_prep_boot_camp_reviews.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/is_american_eagle_owned_by_hollister.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/the_sign_of_the_beaver_chapter_19_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/wojirajidorat.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 5248 bytes
SHA-256: ee523a5358c44a652aa580a4ab08eedec3a83add8783b167fbb3cdf4e2d7c0b5
font_01_sfnt_off000104db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DB 10716 bytes
SHA-256: e454f3044a94d236b4529873ad990d41662730cbe66b00aa10e89af7485911ed

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