Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f7a79489827623…

MALICIOUS

PDF

41.0 KB Created: 2020-11-08 12:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 596cff63caa90d366bbc01f7b74d7ff4 SHA-1: 7f2dc3a283aa9ea59aa6611a4a0a1f00c631c78e SHA-256: f5f7a79489827623726e4ed1b6907aa755daff374a8e1a4aba347e24d5e48376
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, forming a link farm, and directs users to a suspicious URL related to 'showtime anytime activation code'. This suggests a phishing or credential harvesting attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links indicates a likely attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=showtime+anytime+activation+code PDF link annotation
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/tuwazubagukox-wejuw-nujomu.pdfIn PDF document text
    • https://malebikixolu.weebly.com/uploads/1/3/4/3/134358595/4069636.pdfIn PDF document text
    • https://birebojutadavom.weebly.com/uploads/1/3/4/3/134342015/fawuxevakigudi-ropetemur-jumijeromogar-piverab.pdfIn PDF document text
    • https://miboxijudowisu.weebly.com/uploads/1/3/4/4/134491333/874c83bccb21a5.pdfIn PDF document text
    • https://katawemot.weebly.com/uploads/1/3/4/3/134308113/jujepareri-kuzadaweluki-simaf.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/3faa4401-c522-46ac-933f-338c41d04532/jiwafigeberinunolupu.pdfIn PDF document text
    • https://wirotuxesu.files.wordpress.com/2020/11/82393044105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485bebc7-2891-4959-8820-f8df71f3cfe2/12636794605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b6b864-63c0-4163-a265-dcd29882d47b/wasazujotujosakakirizeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e2c4ce-725d-4acc-a4e0-87187cc00cea/52586413430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4037822-8441-4cf1-8d50-3a99e0de30da/32759472116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef4aeca-1452-4355-b7e9-5b6dba29154f/99273017505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37276ddb-7a10-4941-b9da-69bcbac29080/65465160040.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_off000061d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D2 5232 bytes
SHA-256: 92fd57c2c31a70426188cb903666b2b2463b41ccb8327e86e280a8e0db5999ee
font_01_sfnt_off00007396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 10504 bytes
SHA-256: 2ecb2fda0290b126ef4d5c9a44df5ee258a3b9ec303afb9bba0c3c89cb7b55a1

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