Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b4875dff40d028…

MALICIOUS

PDF

68.8 KB Created: 2021-03-01 22:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a1c5b0b5c0c8322b9c30e5bd995c8ee6 SHA-1: 864fcbde23ba6ab98af9fe8507abfa7866b42087 SHA-256: 32b4875dff40d028322d3a4d16a94ee3cfa9faea9ba2cc9286957e03d797d95a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wix?keyword=jlab+air+sport+wireless+earbuds+manual PDF link annotation
    • https://tapulebuzaxu.weebly.com/uploads/1/3/0/8/130814605/7789774.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/45389323990.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/jhcPw2S/49988694617.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/91820024113.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/sigusukusewabalukodew.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/sorevumuk.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/1tvigBp/1950090189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_60336e99514ef.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/how_to_get_rid_of_benzoic_acid.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/duzotevabebukupew.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolegu/hghX5jc/cat_ear_infection_contagious_to_humans.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/dghTGJc/kaporelojujeluz.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/petikamov/ipad_agenda_koppelen_aan_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/whatsapp_for_nokia_x2_java.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/latest_version_of_whatsapp_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/bbc_news_reporter_child_interrupts.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD047 5324 bytes
SHA-256: f2be370dbebf14ebe2811692c6fec744dd83083a34e03f0de46485fb988c45af
font_01_sfnt_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 10332 bytes
SHA-256: b3707b010ebd61d709e0a946c0748f74e61cf5642c6cde9ea5dea8f8c51526f4