Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98d571547951c2f…

MALICIOUS

PDF

77.0 KB Created: 2021-03-21 09:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 89a5b933a51774bce03d56f2a2d8c128 SHA-1: 90745cdf3ea4a69ed5e410ed9310dbf0c174df10 SHA-256: f98d571547951c2f98aca948a1919a14e5a990330b2988ab21e72e1015e3f53a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external URLs, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://baarspo.ru/wix?keyword=a+hunger+artist+summary+pdf PDF link annotation
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/pazefavuwolivedej.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/koguletawiru.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/3692609.pdfIn PDF document text
    • https://fuxovibafisiboj.weebly.com/uploads/1/3/0/8/130874455/9083769.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/71jIZib/vasogagifakexuzavubatonoz.pdfIn PDF document text
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/gesexupofok.pdfIn PDF document text
    • http://marketop.club/takaki_a_different_mirror_summary8mlqn.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/dokola.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/gimur.pdfIn PDF document text
    • http://uose.xyz/how_to_reset_epson_l120_ink_padwxi2n.pdfIn PDF document text
    • http://shtancircul.site/luxonedalozakebewadewulozhj1ma.pdfIn PDF document text
    • https://kexuminuki.weebly.com/uploads/1/3/4/3/134310960/979dea0b797d.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/auditoria_financiera_forense_donaliza_cano.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/kibipugupe_zakotugozixalo.pdfIn PDF document text
    • https://bejidadona.weebly.com/uploads/1/3/0/9/130969139/tizefire.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/marxist_analysis_of_animal_farm.pdfIn PDF document text
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/09bdf82c919.pdfIn PDF document text
    • http://roman-holidays.shop/51052507352gc4xw.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/HHhdhag/green_pepper_nutrition_content.pdfIn PDF document text
    • https://runuwafulisejet.weebly.com/uploads/1/3/5/3/135337902/zakadevisofu_masakamolowavi.pdfIn PDF document text
    • https://kotedeturu.weebly.com/uploads/1/3/1/6/131606402/9301810.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/b07831.pdfIn PDF document text
    • https://dazarurizupe.weebly.com/uploads/1/3/1/1/131164120/satupozosujuwag_jofopowuxubufa_xukemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopisumeku.atwebpages.com/trading_de_alta_frecuencia.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_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 5516 bytes
SHA-256: 1d75ed5884e280e56f5751ba0b7be8468708e4a4166d9e0ed39e0221272b5e8b
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10880 bytes
SHA-256: e86946b7c8a72c316e21b4bfca2b255b4a544b21810aa671d9987781cbb50c09