Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d2d74a4ad0b96d…

MALICIOUS

PDF

74.8 KB Created: 2021-03-17 08:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5b3cd4153740702a7a077a79b5808f23 SHA-1: 7a4c4c7965b9cb5489b5a7ad2b1e9eeca4960d60 SHA-256: 52d2d74a4ad0b96d1978ac0f9d9fffd4129620b5744a0607f3c0caf6c244523c
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains keywords related to hacking tools and impersonates Facebook, strongly suggesting a credential phishing attempt. The presence of embedded URLs and link farms indicates an effort to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/4246197.pdf.
  • 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.
  • 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://ponafet.ru/wix?keyword=roblox+online+account+hack+tool PDF link annotation
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/4246197.pdfIn PDF document text
    • http://fbdirect.site/negritude_et_humanisme_senghormow5r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fca32312ba2b.pdfIn PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/luraxajexob.pdfIn PDF document text
    • https://jijofovi.weebly.com/uploads/1/3/4/7/134755656/5524337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454803/normal_5fe779543130c.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/vupifibigagax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_603b73773780e.pdfIn PDF document text
    • https://bufofeguwozeder.weebly.com/uploads/1/3/0/7/130775144/vovetod_tatukil_taferafi_feterutoweraped.pdfIn PDF document text
    • https://kamutimasevukov.weebly.com/uploads/1/3/1/8/131856564/gilaxu.pdfIn PDF document text
    • https://kefobisow.weebly.com/uploads/1/3/4/7/134733217/ce421b8e74.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/62043784889.pdfIn PDF document text
    • http://junelizirigoroj.iblogger.org/the_daniel_prayer_dvd.pdfIn PDF document text
    • http://beguwidip.scienceontheweb.net/bescherelle_grammaire_francais.pdfIn PDF document text
    • http://piter.store/kilenixinud07mv.pdfIn PDF document text
    • https://gakikodokuni.weebly.com/uploads/1/3/1/8/131857060/5652392.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/gupoken.pdfIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/oscillator_lecture_notes.pdfIn PDF document text
    • http://gezewezelatemak.epizy.com/best_magazine_design_templates.pdfIn PDF document text
    • http://tosopipates.epizy.com/51581380688.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_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 4892 bytes
SHA-256: ad081d0c8c592fa54b89ce7317fa46560fcaa9519cfd9fbee38097dffaf344d8
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 10604 bytes
SHA-256: 3e17feb36f08f4d5b0acd319f0a9426113bf8e4e48fb7dc475d751f441bd725a