Malicious PDF — malware analysis report

Static analysis result for SHA-256 f403c6b90df3fd2e…

MALICIOUS

PDF

81.3 KB Created: 2021-03-29 08:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 960ee2d9a8d50bd2d183d52fbf2ccfaf SHA-1: 549f77bbe996435b40a7f9c3653c245ae820efa5 SHA-256: f403c6b90df3fd2efc930e3382964caa085d835fbb448e16826410dc0cfc2fb7
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution vector, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=army+hipaa+training+jko PDF link annotation
    • http://paksorond.xyz/dcs-930l_driver_cd7zh6u.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/ghPhdhf/35865100229.pdfIn PDF document text
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/xepuvevolawama.pdfIn PDF document text
    • http://nigasheff.xyz/gun_strike_blood_shoot_apk27onp.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/kv2jhjz/mogelefamadijijifam.pdfIn PDF document text
    • http://ukranews.site/karl_marx_selected_writings_summaryzjphy.pdfIn PDF document text
    • https://cdn.sqhk.co/vatukaso/jjocJib/dr_chessin_ny.pdfIn PDF document text
    • http://jobs-ingenieur.best/chaganti_koteswara_rao_books_freexdu15.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/6706637.pdfIn PDF document text
    • http://thedouche.xyz/529588617823h2ls.pdfIn PDF document text
    • http://sreda.city/how_to_get_google_earth_in_real_timexskdf.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/igdhaic/tugenabeji.pdfIn PDF document text
    • http://esagafow.fun/120265550251o81v.pdfIn PDF document text
    • http://grafoanaliz.ru/893528987459kk5n.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/33ghe1h/unicorn_calculator_kmart.pdfIn PDF document text
    • https://xoboxevoz.weebly.com/uploads/1/3/2/7/132740619/pevefo.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/jbqjgjg/89209227697.pdfIn PDF document text
    • http://getsalon.xyz/netflix_s_not_working_windows_10geors.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/gfA4ijC/28227335147.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/jj2rOmv/11810101524.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/a2Hifhc/kick_the_buddy_forever_mod_apk_free_download.pdfIn PDF document text
    • http://zijojot.22web.org/succession_planning_template.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/49f00c67c5807ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://birabigipo.epizy.com/xakagafekuvuzepijiwasep.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_off0000fe7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 5252 bytes
SHA-256: 03e41c7cfc6c029894f28846841a75c71792d66eb49cd932331ca5516b9a123d
font_01_sfnt_off00011043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11043 11244 bytes
SHA-256: 98d0f77d7aa8dfff1b22bd72b096eabfe1bd7ed39aa8ff3f6b8671f128f1bc0e

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