Malicious PDF — malware analysis report

Static analysis result for SHA-256 785d6c39b6ebda95…

MALICIOUS

PDF

43.4 KB Created: 2020-10-31 17:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 571945cbce2f4ca92c88e6b42a5b7912 SHA-1: 43be261ea8926dfbbc864587358cef13ce23cb7d SHA-256: 785d6c39b6ebda95a3746663a3afab9b4803f7d0e7f49f0b20a8e268a414cc6a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to known malicious redirector infrastructure and a link farm, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous external links suggests an attempt to drive traffic to malicious sites, likely for credential harvesting or malware distribution.

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.club/123?keyword=razer+blackwidow+ultimate+2013+lighting+effects In PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/rogadojimijawuzis.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/20226e9.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/5e9ca1a815f7916.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdfIn PDF document text
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/852e82ec3.pdfIn PDF document text
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/0cf50c.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/gidanumofeweb_zakunivixivir.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/8143b9e7.pdfIn PDF document text
    • https://sukuvigu.weebly.com/uploads/1/3/4/2/134236057/dijumilasijebitupa.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/76f0f9a85a.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/fe9f437e-320b-4a6d-b3a8-4bb46160e799/luxixes.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/79741321458.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/pomebomejusiwoves.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/dnd_5e_rogue_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/recoil_rda_v1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644f9201-4e7d-44b5-a925-e88a5bbc4831/6656062563.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_off000067c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C2 6280 bytes
SHA-256: aa132172fdd4a1bbead323c45d96396c77865d66f9d0b3643ea10e801a045e88
font_01_sfnt_off00007d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1B 10276 bytes
SHA-256: f7e5f39f8398846b87ee8a5303356382eb067f717abd3565803ece0adfb23e8d

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