Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b2a152623d8631…

MALICIOUS

PDF

70.4 KB Created: 2021-02-03 17:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4c44429d0693f7d5f47443e7afcd9919 SHA-1: d7ab82786640070f1d1f302f1fafc2f8b13b6546 SHA-256: 22b2a152623d86318312b8a8cc45d4d095b8709fbdca2ba623950561af12137a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=amiga%20500%20rom%201.%203 PDF link annotation
    • https://kopaluzakiletal.weebly.com/uploads/1/3/0/7/130739322/6771556.pdfIn PDF document text
    • http://leopards.space/mario_kart_wii_unlocks_guidel847p.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/rufovufojefuze.pdfIn PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/2826f9.pdfIn PDF document text
    • https://wiruxunuv.weebly.com/uploads/1/3/5/3/135324042/3502563.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/6649318.pdfIn PDF document text
    • https://dijuwinepogiw.weebly.com/uploads/1/3/0/7/130738679/puwiwazividitov-lifonisax-depol-kujufena.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/wujapu/sabrina_claudio_belong_to_you_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/bewobegubuletaleluzar.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/gogazibapidukugofipibizeg.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/river_flows_in_you_sheet_music_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/dnd_fighter_guide_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/delicious_world_cooking_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/goloditujebapaxufesunul.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/wogemofuzu.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_off0000d7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AB 5296 bytes
SHA-256: bb1380f36110b28face701967bf69ea3619037502bf49effeb3b05b89b57a618
font_01_sfnt_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 10456 bytes
SHA-256: d17eb3896f30d36199b13f013e6fbd02930d3d0087adb8892630c75c29bb814a