Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a486960bbe0037…

MALICIOUS

PDF

74.3 KB Created: 2020-11-20 00:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0989737758526044203c98d0c47ca6c4 SHA-1: 26387f5ea32e0207ad5d2cb7632e022bf098ecd6 SHA-256: b6a486960bbe0037ae5259e3e2006966a8a5313988b949b800f92008089d0609
222 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector and a link farm, indicating a phishing or malicious content distribution attempt. The presence of a 'download button' heuristic further supports the lure aspect. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=trainstation+game+on+rails+mod+apk In PDF document text
    • https://luriwopowilexat.weebly.com/uploads/1/3/4/3/134338936/2b43f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f98ae16ddfe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5f936dfd26127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_5f9753a02da55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389370/normal_5fa9b83d1a871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f9331e3d5036.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/6e8423de-5a4e-4b0e-9267-f114b8bc2629/vosadilujevokilukule.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/watch_escape_room_2019_free_online_123movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee3a411-003e-4f16-9384-252fddc10fc5/37985406106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd22719-087c-4e09-aa7e-540e84b67178/88291359934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0140f6d4-f214-4206-acf5-a0430f24a259/pujupopifizewidu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/metizuwutinamiberijetaram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5da83a2-7c57-4851-9788-4309b1f38d00/34339252482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15f1eec-155a-4be5-92f7-47019b1ec173/pogalerij.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 5292 bytes
SHA-256: c96c4e2f33a340d533dcc96e63e797c44b0cfb5c947516fadba6adc7930c96cd
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 10864 bytes
SHA-256: 15db52380fd9b27b4accf6d5140c111d1b9892d5534e6ce09bc861aa8ce49d2c
font_02_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 16272 bytes
SHA-256: 79a8b90f55ff6552f604b654de9415a285e7315ac61835edf8590ffdbde93965

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