Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff34142907605c0d…

MALICIOUS

PDF

93.1 KB Created: 2021-03-03 07:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 15c5b598266751f3546fa5d451e23cc9 SHA-1: b3df60c1fb9cce7f0fdbd12f2a22d6d11ce4191c SHA-256: ff34142907605c0de546e59f63185578a120fba1cca7495a39bae886fa5bb4c9
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/sexoputeditulozib.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/aws?utm_term=does+wix+use+shopify PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393631/normal_601a7280def11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_60347f6974393.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/how_much_does_a_baldwin_baby_grand_piano_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/amHiggh/brick_png_texture.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/dgggiX9/easy_load_motorcycle_trailers_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/voravaxa/fwmZcCP/pezipokixuzilam.pdfIn PDF document text
    • http://rrrrkkkkk.space/142390789222sfem.pdfIn PDF document text
    • https://cdn.sqhk.co/mifimafonuku/NijcWie/assassin_s_creed_syndicate_evie_dress.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/jjVifhe/kiwipodaginejowipebumu.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/sexoputeditulozib.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/ihidNVU/guzavasazenafujalew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_6021407221148.pdfIn PDF document text
    • http://storefromit.pro/pisadivate5mg6k.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/fozowepemupapaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499334/normal_5fdbfda1ce072.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_off000130ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EF 4912 bytes
SHA-256: d351a54db10c100edab7b41756c20c78da4ea985da714cd448c4648935c4fb2f
font_01_sfnt_off000141cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CC 11208 bytes
SHA-256: 98b74a20b02f1f911a4776a767e329841d47a3f2c8388549537d7180fefac1e7