Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a5fef1510ab1ae…

MALICIOUS

PDF

38.8 KB Created: 2020-10-02 01:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 72aa89e8121f7f732edad6429ad4750c SHA-1: 7ad0a33aed433890f5e35da217db06b7e2c09747 SHA-256: 71a5fef1510ab1ae29630f8666b1206892cfea11b81b876366da9ecf23f6711b
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a movie download lure. The document also hosts a large number of links to other PDFs, likely for SEO manipulation or to spread malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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://cctraff.ru/strik?keyword=kochi+rajavu+malayalam+full+movie+download In PDF document text
    • http://files.festivalofthebluegrass.com/uploads/1/3/2/6/132696112/xataviwu-nigutalazinog-zefatami-tudurokugawaki.pdfIn PDF document text
    • http://files.lovingalways.com/uploads/1/3/2/6/132681865/26f219be.pdfIn PDF document text
    • http://nokitu.bereacoc.net/uploads/1/3/0/7/130776428/fizewev-pekanobowumawe-jofupuriwulol.pdfIn PDF document text
    • http://zaxotataw.kasr.ca/uploads/1/3/0/8/130874253/zewek.pdfIn PDF document text
    • http://pekefez.letsgetyoufree.com/uploads/1/3/1/3/131398394/dowepadagekujo.pdfIn PDF document text
    • http://files.envirobagsdirect.co.nz/uploads/1/3/2/6/132680781/beretuxuxuve.pdfIn PDF document text
    • http://rokavepu.koreanatoledo.com/uploads/1/3/2/8/132814342/mejuvomuxapasul-sifipemagevafe-ganuge-nuzuwixurud.pdfIn PDF document text
    • http://files.austin4sports.com/uploads/1/3/0/8/130874134/tosefot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7898/7165/files/xebalakurilixabudikaged.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/maytag_convection_microwave_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/9094338304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/jopalagizopexap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2572e6c6-59a8-4872-9a70-2a5522a14123/33054386963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c488d4-b2e6-4dc8-9e7c-2af24128070c/vezamaxozodojarizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fd55ef-e59b-49b1-9af8-4e04129f0eb7/5805225445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e963cafa-6653-4db9-b46a-59354af2b430/rabivusozafad.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4A 5384 bytes
SHA-256: 1110ca5f4b65d68af2ee5410e1d0b5dd6100e1e91ceac4e10af5d46b54d30986
font_01_sfnt_off00005e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8B 2856 bytes
SHA-256: 07c36c9c5eef22e03b5baebc0a7010276f2c7bf25963ceea92c0a809d44c41e5
font_02_sfnt_off000069be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 9968 bytes
SHA-256: 6013ed2861a2feeafb33370e7bd7bad7d1373700507f3e965151746eec3a6b14

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