Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bf452328e77e89…

MALICIOUS

PDF

40.7 KB Created: 2020-11-05 21:34:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 03b75dcb4c1cbbb42bbc2bed27033e17 SHA-1: 8d63b31666569ba4142c8fe375f5392643f23d2f SHA-256: 83bf452328e77e8961341c5217be669d3b4d44b96e0dd89a76b918b4b61e8288
66 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains an embedded URL pointing to a suspicious domain. The document body, though heavily obfuscated, contains a reference to 'Dnd 5e battlemaster' and the malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and embedded URI indicate a likely attempt at social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?keyword=dnd+5e+battlemaster PDF link annotation
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/fevowugipaw.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/ac7ee46ca8.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/3b0ba99ac7.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/3521372.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/6921392.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/6770895.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/fajeloninesitel/44883592455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca2b85a-7ae0-4274-a8f4-26f3c1126ced/707939223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac87af32-b499-4ee6-996e-b7fc1e13b626/gavuvilikukizifamunubazes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9337/0037/files/pononefitewubamafu.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/sisotabonopifawosemuj.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/21243844492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cf5d6e-3e3a-4acc-9e6c-e9219df0ded3/vefisafaledijumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0320/4527/files/11090569413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1415c306-cdbc-4a27-9424-74ebe626a3a0/33622614928.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_off00006115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6115 5236 bytes
SHA-256: c08427db400c65e29293bcde36000b7bf8a9ef11d74aedcb2281950180e0af7f
font_01_sfnt_off000072c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C9 10312 bytes
SHA-256: 68747d6dbde7b44b49831fffaef40d0aabef0d978cc7a0abbb72fcf02dcbdb9f

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