Malicious PDF — malware analysis report

Static analysis result for SHA-256 c776e14d2510b081…

MALICIOUS

PDF

45.9 KB Created: 2020-10-28 12:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b841bc1b1b8642ae6e6a97edd658ad07 SHA-1: 2238a25054b7a291d572cfe0c8ab905dddc23104 SHA-256: c776e14d2510b08175bd651f9d36e17a84aa0f7d5458199dfacf9345f93c5e63
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=angles+in+a+triangle+worksheet+year+6 In PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/riwax.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/nigaxexuturem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8c1bb73f65b.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/tiwotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8703f9406da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8bc8bd7ce62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8a2f4352a7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8897865f13a.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://cdn.shopify.com/s/files/1/0499/1834/5384/files/54281052836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0302/5840/files/tipipilavebapef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/71648529060.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/types_of_parenting_styles.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/mclean_screening_instrument_for_borderline_personality_disorder.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/30547551949.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/unscramble_sentences_verb_to_be.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/mikafixiwabarem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4558/3517/files/25081711342.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/13997940702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/29235223256.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/different_types_of_aircraft_engines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2307/2921/files/firejirowufutogeserik.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/carrom_rules_india.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/caso_ayotzinapa_2014.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_off00006847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6847 5136 bytes
SHA-256: 780844b599f8deedb084cbb5f6811b50c11f0bb40d2ff9fc9ace0b1aaaf949f1
font_01_sfnt_off000079c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C9 9928 bytes
SHA-256: 03b40ade06cc9d1116ed3bb2dd388af7c731ff3fc31cbcf43519d05513d56b31
font_02_sfnt_off00009bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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