Malicious PDF — malware analysis report

Static analysis result for SHA-256 b541c0350f5ea47a…

MALICIOUS

PDF

75.5 KB Created: 2021-02-14 19:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ac6ff3566b859ea8691e205f9676aba9 SHA-1: 877777e425c655c84bb271107b4d3373ba88e5da SHA-256: b541c0350f5ea47a56780a42e6e35f5c07e150beed5267a771e24da6537f6b1b
216 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for brand-impersonation credential phishing targeting iCloud. The file contains a mass external PDF link farm, with one prominent URL pointing to a Weebly subdomain, which is also identified as an abused redirector. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing lure designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://kajubuti.weebly.com/uploads/1/3/2/6/132680994/nanubateninuzik_sebunipiruve.pdf.
  • 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://bologen.ru/123?utm_term=free+sim+card+at%2526t PDF link annotation
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/nanubateninuzik_sebunipiruve.pdfIn PDF document text
    • http://usene.xyz/84766314000i3njc.pdfIn PDF document text
    • http://bebarupeludif.22web.org/bachelors_season_1.pdfIn PDF document text
    • http://selizixid.iblogger.org/ihsa_volleyball_scoresheet.pdfIn PDF document text
    • http://bufo.online/bubapuleguworibogw7rz.pdfIn PDF document text
    • https://ronunafo.weebly.com/uploads/1/3/1/8/131856498/ruwupomabiwobi-bukujuso-jejizujabumoxa-zetalig.pdfIn PDF document text
    • http://cccckkkkkdd.space/10474046731lewxg.pdfIn PDF document text
    • http://kudezixajuxuni.66ghz.com/google_bookmarks_android_app.pdfIn PDF document text
    • https://palejuzuz.weebly.com/uploads/1/3/5/9/135959315/ranesajiri.pdfIn PDF document text
    • https://kasitawudak.weebly.com/uploads/1/3/1/3/131380619/e3d84.pdfIn PDF document text
    • http://bhd-management.space/47701209387682qd.pdfIn PDF document text
    • https://bulipegorevuju.weebly.com/uploads/1/3/4/7/134700868/zeloralewadigox-gudodaboze-sejizerevas-kodiduw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dumupa/povakidebedenepevu.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/20632722286.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/animal_jam_coyote_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/zomerobexe.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/70602715013.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/accountant_cv_sample.pdfIn PDF document text
    • http://josetevuj.epizy.com/gixevarinat.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_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 5008 bytes
SHA-256: bbbaf3e46fb3163af2b4afddc1a667859daebca406624edab1fce086c5741eb5
font_01_sfnt_off0000fd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD30 10496 bytes
SHA-256: 6c41286c86148a3dc808abee7317bec184a3e947edf7ad679d5a2950b800f00c

Open this report in the interactive analyzer, or submit your own file for analysis.