Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f0a9a3f5882834…

MALICIOUS

PDF

111.6 KB Created: 2021-04-09 18:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 04a1fc05b7c159dcf165d6522128134d SHA-1: e917e84a30f699f68aaa4173e39f4e19fa63d502 SHA-256: 06f0a9a3f5882834e933aa4dfa908d80f50577dc06857ce3d0e1074594163e44
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a 'download' button lure and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The primary URL, https://resalured.ru/strik, is likely a redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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
  • 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://resalured.ru/strik?utm_term=metal+gear+solid+2+ps2+roms PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480756/normal_5fe142d4ec99f.pdfIn PDF document text
    • http://tukomibewi.getenjoyment.net/holy_bible_new_international_version_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5fd2a1d50063d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_6023cfd9edd2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377706/normal_5fff2873664de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_60694dce90306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_6036d8e06e95d.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/62444665017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_6029663a2d7ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_6025cb1b06895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/kodak_technical_pan_4x5.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/wopemim.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_12396b66352f43829de1e8195a216ab6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/janatha_garage_video_songs_free.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_f3f412c5b3674fd8b0c01b3203240c90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/self_dependent_meaning_in_marathi.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/business_productivity.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_a371e7e028a14a41adcde711a6a9c36f.pdf?index=trueIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_8f2f3437ee26485e90b94e30658169bb.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E99 6304 bytes
SHA-256: 9241c708fbc577db401147fa9a3b78434f900a64b84216c174e63ad5396695c0
font_01_sfnt_off00017428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17428 5416 bytes
SHA-256: 92ccedc05180f6b4cf46dd18897f56bf3722d998852162d943d067e36687d028
font_02_sfnt_off0001868b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1868B 12732 bytes
SHA-256: 07fef7649dfa76e9c274e2ef73b34659aec557baf9c427c40440363a70c311ae