Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4964bbae4218de8…

MALICIOUS

PDF

84.1 KB Created: 2021-02-16 08:39:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ffcf8aa30db8a85d2e723542bd5d5c80 SHA-1: 19ebc27ac3679794d555a47eba0545c578933ed7 SHA-256: d4964bbae4218de8431d204a83e7d0bed4ae9688630d1d2f35d7e8803a45ba2f
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one identified as a known malicious redirector. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of numerous links to disposable hosting and potentially malicious domains strongly suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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.
  • 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=hatsan+flashpup+regulator In PDF document text
    • http://gifipagi.22web.org/mufoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_60244c1f9cfd9.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/gjdt3kz/nopeduruvijijisefisugog.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/tigCCrk/shadow_skateboard_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kerodamajop/LzgjiP6/framed_appeal_26_bmx_bike.pdfIn PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/pawurifefajuv.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/deboru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_5ffdb2a014e4b.pdfIn PDF document text
    • http://fewemika.66ghz.com/74351149189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fe30a4c87b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_602b4351be2f7.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/3670199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://loxosufodu.epizy.com/76795428562.pdfIn PDF document text
    • http://fabomisibis.rf.gd/selofuxa.pdfIn PDF document text
    • http://puwodadivuxasaf.epizy.com/rorixej.pdfIn PDF document text
    • http://mupegutiwigo.epizy.com/worship_songs_chords.pdfIn PDF document text
    • http://xetatiwu.rf.gd/pusimanojidipebitixeg.pdfIn PDF document text
    • http://surifetopene.epizy.com/hanau_h2_articulator_manual.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/xajixilawolagasosedo.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/zugexutoxezamapex.pdfIn PDF document text
    • http://wijinap.rf.gd/3d_video_software_for_pc_free.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_off00010cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 5124 bytes
SHA-256: bdfa31cf4e02bb9a3629d981bf78904d7ee3db8659257a6781ea7fe89dfb42fd
font_01_sfnt_off00011e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2E 10760 bytes
SHA-256: 667bc04fe78be965aca6f0d981e5a7231c69f954b8501fbc0890151d7b91c48a

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