Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b6065553b03f80…

MALICIOUS

PDF

68.5 KB Created: 2021-02-14 00:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 831ceed60895b1cce7c25b6a607a64e1 SHA-1: 498db740ee2ed49761749a7db8703b46154e2017 SHA-256: 19b6065553b03f80953223c8db3817cf7d54e124578eae7801e799c51bb54c81
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/wix?keyword=central+nervous+system+review+worksheet+answers PDF link annotation
    • http://vykupavto54.ru/callaway_big_bertha_alpha_adjustment_guidelh6x8.pdfIn PDF document text
    • http://doorstepcomputers.com/frontline_commando_d_day_apk_mod_obb2jtp3.pdfIn PDF document text
    • http://ehaberdevlet.com/dobojadikuxofl617k.pdfIn PDF document text
    • https://zuwadakake.weebly.com/uploads/1/3/4/6/134664894/02180a8b0090.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/ed949.pdfIn PDF document text
    • http://avtoshtorki.shop/xizejafafoluruk7cdv9.pdfIn PDF document text
    • http://krokoboko3.xyz/xomafifotevafavelezabuzagduh1.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/igCe6if/rojejuwezugulujubemis.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/zesafi.pdfIn PDF document text
    • http://digtalcaliper09.xyz/slow_motion_editor_keeps_stoppingywnhq.pdfIn PDF document text
    • http://gallery-shop.site/chew_wga_0._9_windows_7r5s3h.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/fusibabuk-zujusejo-gaful.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/81e62489a2f693d.pdfIn PDF document text
    • http://souve.me/cesam_centre_de_formationbqsf0.pdfIn PDF document text
    • https://vavinaxedekofew.weebly.com/uploads/1/3/0/9/130969509/8263785.pdfIn PDF document text
    • http://lotto-investclub.com/adobe_lightroom_photoshop_mod_apk372gq.pdfIn PDF document text
    • http://tur8osale.site/buwozufof91z9d.pdfIn PDF document text
    • https://moxizeza.weebly.com/uploads/1/3/3/9/133999163/gokejutokikifit.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/J3hgxhh/old_russian_baby_names.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 5148 bytes
SHA-256: f0f168dd7bb0347363e822c49e89b991b73ca72550ac9d297f987f5365042b05
font_01_sfnt_off0000e1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 10104 bytes
SHA-256: 460748f6146b0064fc518d780ce7306af2a4d7666eeb7b87fe7da46873c5d7c6

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