Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e5d94417e0b24e…

MALICIOUS

PDF

55.2 KB Created: 2020-11-02 07:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e75378517429353eed4109ba1c023e7f SHA-1: e125ef4704eee3fdbe03348cff54765ec05d27fb SHA-256: 38e5d94417e0b24e06335c12b10583eb0eb748113a257c2f071688ccabd828f4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. The document body and embedded links suggest a tactic of creating a link farm to drive traffic to potentially harmful sites.

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://ttraff.ru/123?keyword=the+watsons+go+to+birmingham+pdf+free In PDF document text
    • https://xeruwuxopexok.weebly.com/uploads/1/3/4/4/134467304/708a5bfeacbf.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/vitaxobilar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a712e28f-9a72-4ea4-a0d1-0a47e3af00d4/estampados_y_bordados_ponce_income.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/breaking_into_wall_st.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/kant_aufklrung.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/autodesk_inventor_fusion_2013_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/canciones_catolicas_para_guitarra.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/phi_alpha_delta_uiuc.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/10818128505.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/rumifepofakomegobasojeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8acbb8-be64-4a61-bc67-f203ccdd1647/32028201451.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/bisugojalabope.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/large_spiders_in_oregon.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/coming_round_the_mountain_funkadelic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/660b0818-4355-4d70-8fc8-cc19822b15aa/jorge_giacobbe_fue_montonero.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99AA 5604 bytes
SHA-256: c40fb7ddf60740d3e007f7e10307b62ceb68454b2e8635743a6353d1edaab429
font_01_sfnt_off0000ac99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC99 10344 bytes
SHA-256: 702112cf68adf6fda2f8a35571fa5b424604a1a04ea401be5c460e9c8d933bbb

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