Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf19132a814215e…

MALICIOUS

PDF

72.6 KB Created: 2021-02-23 17:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 789c79ea68ba5a549c44aef30a53a31e SHA-1: 34102ffdcd5af6d2109b0e1e77132665a11386a6 SHA-256: 3bf19132a814215e4881a293dfd5f90f7d1c6a16e683f2603d104272b8b2f61f
254 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wix?keyword=4+observable+characteristics+of+a+chemical+reaction In PDF document text
    • https://ronizizuvuf.weebly.com/uploads/1/3/4/7/134707383/11ba9bac9a6e93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413845/normal_5ff1994da70d7.pdfIn PDF document text
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/7437151.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/66595628672ev6bn.pdfIn PDF document text
    • http://niwujobexev.22web.org/wazixurirajelu.pdfIn PDF document text
    • http://madewithsunshine.com/jobinefevaralutojoga09mmd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452206/normal_5fcaf5ad097a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477183/normal_600215a88f442.pdfIn PDF document text
    • http://bemigovoso.iblogger.org/mandatory_reporter_training_mn.pdfIn PDF document text
    • https://porujeworor.weebly.com/uploads/1/3/2/8/132814718/kibajaliwova-xirerab-sutixivuru.pdfIn PDF document text
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/7687672.pdfIn PDF document text
    • http://pubgucbayim.com/prentice_hall_gold_algebra_1_answers_form_gltedn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fe7a80f5eb38.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/bc6f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixewawomito.epizy.com/gumomujunifanonijafike.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/why_isnt_procreate_showing_up_in_the_app_store.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/rent_receipt_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/physical_science_grade_11_mechanics.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/biology_book_in_bengali.pdfIn PDF document text
    • http://lagufezoseni.rf.gd/xopilup.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_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 5316 bytes
SHA-256: aee5b3aa13d636d23ab25ab6a02d7749529f65bc2a3988e67326f868fb22ea6c
font_01_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 10220 bytes
SHA-256: 10f5d68d1e547f8c0c0244e771a27f75d5410a8da9ec8cfad2932af6e9f76af3