Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bf4d3d8fa08661…

MALICIOUS

PDF

42.0 KB Created: 2020-11-01 20:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 60cdd294f2fb9f6ffe15c6533d005992 SHA-1: f6b89ea6687be7b0b9289fc4960f8459d1450449 SHA-256: d0bf4d3d8fa0866105ab617bdde82882263d57dd95d9da70fbf4a3606a6f0798
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://ggtraff.ru/aws?keyword=piggy+pie+dallas+tx In PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/vesokipuz_judinenoni_mojosetula_powuri.pdfIn PDF document text
    • https://vujuzujotug.weebly.com/uploads/1/3/4/4/134478410/texusop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8729cf26a85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/tebirewuvanojezegujotaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/10347063888.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/affidavit_of_adverse_possession_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/kuzajedapa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/pp_11_tahun_2017_perubahan.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/6835450427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8ebf06-0ad6-470d-91cf-669f7c1f0dae/tuzexabaxupazigi.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/sodesabekimon.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/approach_and_avoidance_motivation_and_achievement_goals.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E4 4776 bytes
SHA-256: 4a17df2b3b8b9095ea94cc9bada8000d75a102e86ce43b6b26b669f531c5c56b
font_01_sfnt_off00006730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 11440 bytes
SHA-256: e1adefb79b9627235af99395521ddd91d72594a9cdb6903cafe87cea57da3079
font_02_sfnt_off00008d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D52 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f