Malicious PDF — malware analysis report

Static analysis result for SHA-256 787bd2dde4654ea1…

MALICIOUS

PDF

72.8 KB Created: 2021-02-24 20:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 902f98c8abba18d9548c1329ae4091ff SHA-1: 90759cbea4def4ea670217988b55f49e9cc70b3a SHA-256: 787bd2dde4654ea103532c73f8477fc249c1365816467fbb9fd8f95f6dc95066
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://druttle.ru/wix?keyword=garrett+turbocharger+repair+manual PDF link annotation
    • http://wijetaz.mypressonline.com/54249328721.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/rofawewazo.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/8ec96a.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/79481803934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_6029b2dd5d25b.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/wexidesapezok_wujamoxaxoxuxex_fezoduzeduned.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/digital_marketing_bsc_london.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/mystery_brain_teaser_puzzles_nz.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/24241348266.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/juvetaso/ccna_voice_640-_461_lab_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/92013073803.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/bitdefender_antivirus_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/vipunewuvopixokufezesad.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/fanorudugabesage.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/fluke_289_true_rms_multimeter_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/614671392.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_off0000d6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BF 5340 bytes
SHA-256: 94f642d97fe621281d390e23bc48ec50978cd31fca24ef3fdd22b71e6d42a635
font_01_sfnt_off0000e8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 14324 bytes
SHA-256: 335f752c599feca283ed06f5ff8872e8975b5aafb6da51ba83f736c1a9a83cc1