Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da39707d6142913…

MALICIOUS

PDF

86.0 KB Created: 2020-10-23 23:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a92f64d551d5c12c2002352eb82692e9 SHA-1: 37e226b53edc8b633c90d1b37d0b9292a21f0bb0 SHA-256: 7da39707d6142913b850574da9571b5962efa76f6e3b4eee4263b55769ca8309
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Fallout 4 outcasts and remnants'. The presence of numerous external PDF links suggests a link farm or redirection strategy. No scripts were extracted, but the PDF structure itself is being used to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=fallout+4+outcasts+and+remnants In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8e672aa14de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f9274cf732aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8b56a078cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8a453f7a97e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f87288fefdf2.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/ligifuvu.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/vuxuwanu-giwosofib-begemekofegesu.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/tonegajer_leludumis_vojifidunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f88c5a04b696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8b0b2721613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f8e724d5a6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f8fc3bc13d5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/adobe_photoshop_tutorials_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bonupewabube.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xijinutulusuzisafikela.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/struts_1._2_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/bsf_offline_form_2017_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/fake_apple_receipt_email.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/48617413532.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/xedodojituwulewifivemujim.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/xijise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9526/8770/files/nugabuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7276/5083/files/bharat_gas_form.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_off000111d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 5128 bytes
SHA-256: 7d1eb2e666c30ec098643252d9de125234424a82d24995fd015d2cc025632b9a
font_01_sfnt_off00012338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12338 11548 bytes
SHA-256: 68f95c87a4cd2978201d446b43e742762356b90363ad5a416a5eeceb38378bd1

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