Malicious PDF — malware analysis report

Static analysis result for SHA-256 515c6ab7706a9d22…

MALICIOUS

PDF

68.9 KB Created: 2021-02-21 15:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 36c67c5ef40f1c97e3bc7fdd55b59daa SHA-1: 9e76df7443a7fdacf81b2f129464bb335da5fbf2 SHA-256: 515c6ab7706a9d220ff2535de9452cfc59eccbb60cf63211fbd8b40dd1655eb8
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=la+fitness+brooklyn+park+hours In PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5ff5c19f06c56.pdfIn PDF document text
    • http://itravelimpressions.com/70113602288t1p6a.pdfIn PDF document text
    • https://zanudega.weebly.com/uploads/1/3/1/1/131164011/tesimutu_dasogev_sulebujo_besuwejadanux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468551/normal_5ff86fd7a4067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5ffeccba1ab3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_6012d480378e3.pdfIn PDF document text
    • http://e-devletodeme.net/221202658334ypxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470207/normal_5ffb692d8d40b.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/wapaguwedimej-welizinuma-jevuligex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366987/normal_5ff40192ecdf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_60137ab085016.pdfIn PDF document text
    • http://salleapp.xyz/how_do_you_charge_a_dead_citizen_eco_drive_watch4kzkw.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/xexawoxosugox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_5fd7aa69a243a.pdfIn PDF document text
    • https://boleturem.weebly.com/uploads/1/3/4/3/134398498/2625900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lerezazo/povalakikukoseloviral.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_off0000cc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC56 5236 bytes
SHA-256: d34235efba05da2ac6158d42a398debdb634bac14b4a8cec283d17f0a51334b5
font_01_sfnt_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 11616 bytes
SHA-256: b123f4a88650eecb161ef2d96e1847e4f15bf8bcb8d66ebc86cca6c841a1fb9e

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