Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b39fffc3faa52e…

MALICIOUS

PDF

68.7 KB Created: 2020-10-25 12:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a3ac863dd0653b7682ab4b0b24989f81 SHA-1: 3cafa6cfff316b45f3600820722df514e7a42961 SHA-256: 26b39fffc3faa52e543dcd447d2359462e4326750b1ae3859c01c1e11e9fbb32
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.me/pify?keyword=botched+up+bodies+netflix+episode+guide In PDF document text
    • https://papokerudinex.weebly.com/uploads/1/3/4/3/134310480/6bfbccfc08640.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/disejeluta.pdfIn PDF document text
    • https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/ddfd4521af67a91.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/lumominukene.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/widamaloza_zumubik_sigovegataberag_gesutoxumogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c968.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c968.bin)
    • https://cdn.shopify.com/s/files/1/0480/7399/8500/files/64493759113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2743/0059/files/xilav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6285/1749/files/touch_of_eco_suntrap_pro_review.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/14266615855.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/energy_storage_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/hillbilly_elegy_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/68599961102.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/xurutezejejemotoxivejoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/64161011172.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/annabac_svt_terminale_s.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/33803368586.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/armor_of_god_bible_study_for_youth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8982/8771/files/24093835082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7570/5240/files/image_slider_in_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/nirurepus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0201/5139/files/dan_case_a4_buy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3859/4966/files/21409202797.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 extracted file (font_00_sfnt_off0000c968.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC968 5368 bytes
SHA-256: c776ec2344ec5ccdd83d3962ebb3a6b0c9ee26585df040055c718e1f120026e9
font_01_sfnt_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 13644 bytes
SHA-256: 502ae6f4a2083107cb7858abc2d8a1fe16028edad5500197ffc1c3f78a632ae2