Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b892bde5f6c5e6…

MALICIOUS

PDF

180.8 KB Created: 2021-03-20 13:36:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e8eaf03eb5096a3df99cf79d1abebe6c SHA-1: 64e7ab6c89fe2e3b9fca2f78e09fd381495d8886 SHA-256: b7b892bde5f6c5e66d95f5a7ae93f5a93e533f92ab95ab1fedf3716aa536e6ef
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs, including one pointing to 'druttle.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of external links and the overall detection profile suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=discrete+mathematics+lecture+notes.+ppt+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5fddcb19c3d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448976/normal_601b1d53111b3.pdfIn PDF document text
    • http://kafawen.22web.org/orion_chiller.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/bie1oig/android_sdk_aapt.pdfIn PDF document text
    • http://zupedaganivo.66ghz.com/33476970065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_6045eae4be413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_604185fcd95a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492880/normal_600fa9cb96e19.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/jemjjih/street_view_google_maps_android_not_working.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waxaravibew.epizy.com/how_to_install_vinyl_stickers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6571c1b-8d19-4b62-b260-e58283f3781e/dijulawezav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1668b2-83ca-4ed5-81c3-a092dd089ce7/focusrite_scarlett_2i2_macbook_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe97a91a-f7eb-4012-889d-16db70bffb60/24061931144.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_4ec2a66b1bb44b1bbd12390e39e76128.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de22c37a-116a-4c7e-9abc-6f015d55f324/sigibowo.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_dddf03098a334118810991c7cea4965a.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_bea08f55ee244671917530e130dec09d.pdf?index=trueIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_e360e0bbd26e4588b8b724704187df66.pdf?index=trueIn PDF document text
    • https://b42dfab6-8227-42c4-8fe5-fc04d9433513.filesusr.com/ugd/a9a8df_3ae7a51597234bfe8fb9d724079e6f3a.pdf?index=trueIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_7265b2b3a47446c4b17adb0ba73f5b7d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5ee13f-3bf4-4c4b-b915-26f06917a6ee/drivers_dell_dimension_2350_xp.pdfIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_bb4dc7d9aa5b4d9c9f30ba3fe744112f.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24D2D 14044 bytes
SHA-256: 11c970b87e1cb400820107bd60a1e4e8afe71250383a56c7864ca9e4c35c5f65
font_01_sfnt_off00027145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27145 5424 bytes
SHA-256: b5442d1332eec4acb173f83b586a23b180098ccfffeb837abdb818bbe0a4fdac
font_02_sfnt_off00028394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28394 12388 bytes
SHA-256: 6652681eda1914a9ab8bef2e836cfe833aa9b0cdd53d9183b9aee9108cff0e6d
font_03_sfnt_off0002ad7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD7C 16404 bytes
SHA-256: 4e294c39e3dd6036dadc39193a99f4d02c6edbe70e9dd7eea01651eee906b41e

Open this report in the interactive analyzer, or submit your own file for analysis.