Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0003c77f5566d05…

MALICIOUS

PDF

72.2 KB Created: 2021-02-24 04:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f76f95e276694d3faf702069a00938bc SHA-1: 7faa10a12e6166b3ef0c738f0cc3a32ded23828b SHA-256: e0003c77f5566d05d5e1172ac10a37ab4f3ba38fa379be6ef789d9f6bf38e866
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://baarspo.ru/123?utm_term=whirlpool+refrigerator+fridge+not+cooling+but+freezer+is+working', appears to be part of this link farm, suggesting a phishing or spamming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://baarspo.ru/123?utm_term=whirlpool+refrigerator+fridge+not+cooling+but+freezer+is+working PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411696/normal_5ff2a0afa1a74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410418/normal_5fcaa56c1b8bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378621/normal_5fcea5ac1d42f.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/canada_provinces_and_territories_map_worksheet.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/957e5741b59b31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_5fc70d8e59f4f.pdfIn PDF document text
    • http://dovulup.iblogger.org/78703075426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gesesasogibigaw.rf.gd/cvs_caremark_medicare_d_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/best_yellow_sheet_cake_recipe_ever.pdfIn PDF document text
    • http://tumofif.rf.gd/video_call_recorder_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/vuxenedifapufofufafokote.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/91445462071.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/animedroid_s2_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/afrobeats_mixtape_2018.pdfIn PDF document text
    • http://vimutimagokezek.rf.gd/yaadon_ki_baaraat_naa_songs.pdfIn PDF document text
    • http://getetir.epizy.com/arabic_fonts_free_for_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/metformin_1000_mg_po_bid.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_off0000da27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 5776 bytes
SHA-256: 40380b4e7fe296fac5567e602656bb381f381f3220b37d72c3da437767b528d5
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 10940 bytes
SHA-256: cb603b791dff9f4438290589184cedf3b9c117f1081667d8de6a04a2ad0e4649

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