Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f875c3a6d942e8…

MALICIOUS

PDF

93.9 KB Created: 2021-03-03 07:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2f89238634bd69e184a92e1ea3e0b5ae SHA-1: 4e64c5d70311571b60a97cdd325598c670d81761 SHA-256: 86f875c3a6d942e8811be2fc315920a999f9814273f116b252760824e1de617e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely leveraging social engineering through seemingly innocuous content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/123?utm_term=tim+lahaye+left+behind+series+movies PDF link annotation
    • http://topstop.site/95808024728vcyhn.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/hPhcM5D/fox_racing_wallpaper_for_iphone_6.pdfIn PDF document text
    • http://nosinoski.shop/math_worksheets_for_grade_6e3mpi.pdfIn PDF document text
    • http://jakartapro.xyz/pubikubredtg.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/nivewij.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/american_red_cross_first_aid_classes_near_me.pdfIn PDF document text
    • http://a-trvl.ru/xiropavobagevitawp3s00.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/385337.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/zixoxigukaten.pdfIn PDF document text
    • http://sweetmeet.online/bazowalazivopek1wb2.pdfIn PDF document text
    • http://curvepreloved.com/nvidia_jetson_nano_datasheetsmnkd.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/LgegcLc/how_to_make_origami_animals_and_birds.pdfIn PDF document text
    • http://busibear.com/53332278230epm7c.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/1ggnytP/wojagetejerazewizoxubepop.pdfIn PDF document text
    • https://cdn.sqhk.co/neruxojus/ajhjnwG/funny_animations_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/Shagpgd/playerunknown_s_battlegrounds_pixel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jokosen.atwebpages.com/76793712420.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/96065629737.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/character_creator_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/40855291399.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/verbos_regulares_en_ingles_en_presente_pasado_futuro_y_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/android_live_video_streaming_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AF 5184 bytes
SHA-256: fcda4b60c45889bfa5a0fe6e6338288fc90e07be5c88bb6f3af8a42774be8e79
font_01_sfnt_off00013524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13524 11856 bytes
SHA-256: 87b6ad8b60561e67dae59afde20afadca22f09e637ec1ad463e830715e598868
font_02_sfnt_off00015bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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