Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cb0976f38bd813…

MALICIOUS

PDF

83.9 KB Created: 2021-02-16 20:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb72c0efe474c38af4cc5595f1f8c8f9 SHA-1: 176f4c441a96cdf95aec2153214177ccef2cf37a SHA-256: 00cb0976f38bd81306e15e9bf00c6083ee3adb0ff86ed7688e5fffbd4cf2472b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=death+note+live+action+age+rating PDF link annotation
    • https://cdn.sqhk.co/jebavimot/qyjfyhj/fozenajifopenod.pdfIn PDF document text
    • https://kasewipiliri.weebly.com/uploads/1/3/4/9/134901701/niniletorenume.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/ruvilezafugese_xowaga_faropozif.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/45h3Sgg/galaxy_on_fire_2_mod_apk_andropalace.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/c2ibja2/49356432497.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/63049863092.pdfIn PDF document text
    • http://naxiramomamaz.66ghz.com/59913273906.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/latavajiboxug.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikijun/XEKUwPA/space_jumper_h_m.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/5jejigf/vutobadi.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/kosatote_lezoxotijedi_powope.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/fghNgh5/chain_reaction_sneakers_versace_price.pdfIn PDF document text
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/1925300.pdfIn PDF document text
    • http://vorgazme.com/354604209255pslp.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/vetinujulozup.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/gixewoxebetezun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubaporejolo.rf.gd/cushman_wakefield_toronto_office_market_report.pdfIn PDF document text
    • http://xejarejunap.rf.gd/emerald_green_arborvitae_care_guide.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_off00010993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 4940 bytes
SHA-256: b12ae2787f622ab9fb3276c6782ed4281070ec277ecc536ad6b48dbe691e5edf
font_01_sfnt_off00011a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A67 11760 bytes
SHA-256: a30cad6c84b437f1f6a41f23cea03a85c8f3228e245affa5365ef9ff55883af6

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