Malicious PDF — malware analysis report

Static analysis result for SHA-256 153e3916f941281d…

MALICIOUS

PDF

70.2 KB Created: 2021-02-21 22:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cd29ea9e7cc321fd5c2ad9c0d0bf9d0c SHA-1: 339685bf18c55bf52ba894f1be3db50e5d4eb19f SHA-256: 153e3916f941281db464dadf9b787f85c66d8d64de74c2d3dc671cea40d31dd9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=thing+explainer+pdf+vk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489028/normal_5ff07398d9386.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/4580197.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/fezorulozanipul_lizop_xetuwig_wepukudixuwo.pdfIn PDF document text
    • https://rusuzewaridoxi.weebly.com/uploads/1/3/4/7/134761315/lamitaxasijanilaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fce5c65c8569.pdfIn PDF document text
    • https://lojavexir.weebly.com/uploads/1/3/5/9/135963097/7662035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5fe2ef6fa90a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5fc6da7409811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369141/normal_5fe47fad24611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_60315754c0212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_602f7f90ce587.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/jogogakab-vabajeke-nuvimipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_602b3b3cc3674.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/rurosaveruk/the_world_in_2019_economist_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/34641290220.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/best_voice_auto_tune_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/27283639806.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/tugogebajekeme.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/bogus_basin_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/gonilapijaxawubizel.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/azure_sql_dtu_performance.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_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 5264 bytes
SHA-256: bbec698f4bfb8bfd9b697e4fedc614e08d228e8789e05f22082a04f0f554cd53
font_01_sfnt_off0000e939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE939 10220 bytes
SHA-256: 7b42783e6e2becb8ab8735c3fbf64f7a8fe05ed1ea14ea3a4469485efdc0916d