Malicious PDF — malware analysis report

Static analysis result for SHA-256 8007c002cffc19a8…

MALICIOUS

PDF

93.9 KB Created: 2021-03-02 09:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4e952b3e950b7ed73b5696a3b03bd60a SHA-1: 531cb248ed2d024a35138408f8e90bb423338682 SHA-256: 8007c002cffc19a8d502949c9131d5f29b89424efd99e513c78bbf215ee755b2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=girl+scout+cookie+rewards+2015'. This indicates the document's primary purpose is to lure the user to this malicious URL. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/strik?utm_term=girl+scout+cookie+rewards+2015 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5fcdb893dca9b.pdfIn PDF document text
    • http://paringljkf.com/slice_and_dice_menu32ok8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401994/normal_5fd04da52ca5c.pdfIn PDF document text
    • http://reduslim-officialsite.site/dejegutujakidezio8m61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_60142c800de58.pdfIn PDF document text
    • http://azorocheat6.xyz/97349095419qvgyk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444114/normal_5fc8ce792c133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405902/normal_60018d39e187f.pdfIn PDF document text
    • http://paruvam.22web.org/photo_video_maker_android_github.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/vampire_diaries_originals_cast_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_6018ef5cf360e.pdfIn PDF document text
    • http://autoupgrade.website/ravens_depth_chart_2016yndax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469828/normal_5fe19731176d3.pdfIn PDF document text
    • http://smartcreditus.info/32792340904zunsq.pdfIn PDF document text
    • http://atomlinux.com/supaligizuxizajevapamod98cxn.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/wildgame_innovations_owners_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugetad.myartsonline.com/whats_a_synonym_for_captivity.pdfIn PDF document text
    • http://jitemawuvefogox.epizy.com/ios_13_public_beta_2_free.pdfIn PDF document text
    • http://difugarulid.epizy.com/kerudim.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_off00012df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF6 5572 bytes
SHA-256: 4e2a0c4810cc0a453a17ff3bffb9989ed24313c9f1afe5ddd43802f579cc2796
font_01_sfnt_off00014120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14120 12440 bytes
SHA-256: 1fc09ef3a9c352a2ea37611457588230d3e4919427089a098290f3bdc45ff88f

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