Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a7dab6e7fbe5cb…

MALICIOUS

PDF

52.4 KB Created: 2020-11-05 18:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0866bb0f32721a589eb9b9821188d560 SHA-1: 8ac486653b6d0c513eb35b12bb597414eb624844 SHA-256: 55a7dab6e7fbe5cb28a938010ddf3d29f2fa914322720eb168de84d9dcaca22d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/aws?keyword=watch+bumblebee+online+free+123 PDF link annotation
    • https://siwikuzovusodig.weebly.com/uploads/1/3/4/3/134357046/dilatodipav.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/3717226.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/dd70ac3cc202.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/388efb16d8559cf.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/wutavodazu-xenosiliziz-fexivebox-takij.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/guwijubukunitas.pdfIn PDF document text
    • https://zosibikatojufo.weebly.com/uploads/1/3/4/3/134382834/9739161.pdfIn PDF document text
    • https://nuvetifozeg.weebly.com/uploads/1/3/4/3/134358797/xawunujesap.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/watajive/foscam_fi9831p_v2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/canasta_basica_familiar_peru_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/chemistry_isotopes_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/jekojetumazevetinix.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/67612235979.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/31116037435.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/lezazomov.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/tepukerasujimobe.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/27336093552.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_off00008c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4D 5444 bytes
SHA-256: ec28cb2bbd264c1dc3664e657cb28f33d5b274537fd5dbaad76f431640f6d0d7
font_01_sfnt_off00009ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC0 11108 bytes
SHA-256: 73d7dfef72cb737d174d36468fe77c8bffc4966f4edf7de71bf1aac04701d955