Malicious PDF — malware analysis report

Static analysis result for SHA-256 093e62d72a3a4876…

MALICIOUS

PDF

83.0 KB Created: 2020-10-29 23:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1e0065a1d80d49216539ee09b60b1c49 SHA-1: 18afd8685e4b0f1e6e134393b0e0821ebca11355 SHA-256: 093e62d72a3a4876238a13dda32a0417e515df0c0b88d839f0e7e0b7726dbcc9
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'articles of confederation political cartoon analysis' and a URL that appears to be part of a link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?keyword=articles+of+confederation+political+cartoon+analysis In 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/94d7c447-6c2d-499f-ad1f-c4b3ca0e5942/zebawizaxikolujibifere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0907/9458/files/jirido.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/complete_guide_to_embroidery_stitches_download.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/3723049689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7296/1688/files/rozowevobilupurosuwil.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/moments_choose_your_story_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/fasusorowikulugetifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/560adbeb-8c20-4797-8f88-fc796ffc5782/1054131438.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/qasida_burda_shareef_urdu_translation_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jonij.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/74254911588.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/sociolinguistics_an_introduction_to_language_and_society_trudgill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/86575904109.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/disadvantages_of_geothermal_energy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0387/4967/files/51315107163.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_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 5240 bytes
SHA-256: ffe1ce752d5700b4161663b14df9a7fa6a73d72eeda1bff3e7b6af208114d704
font_01_sfnt_off00011c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C28 10112 bytes
SHA-256: 3141cd81ea9d99882fac69776c83e0b35b0090007b6807a494d23efaaaa04a5a

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