Malicious PDF — malware analysis report

Static analysis result for SHA-256 7faae572cfcba10c…

MALICIOUS

PDF

77.4 KB Created: 2021-03-30 04:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2fc67f474a1ec31d442595178d0c0816 SHA-1: 8cf93d1ac71c420ab368045e888bf6264e7e154c SHA-256: 7faae572cfcba10c50adfe1ed776ec4996bc6f606c39ff1c2204867bce75d9ad
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a phishing lure related to Android APKs, directing users to multiple domains, some of which are disposable hosting. The presence of numerous external URIs and the link farm heuristic further support a malicious phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/123?utm_term=ios+facebook+messenger+apk+for+android PDF link annotation
    • https://lukajupuxeburi.weebly.com/uploads/1/3/4/6/134630189/5845703.pdfIn PDF document text
    • http://fagemolorano.iblogger.org/atlanta_falcons_current_injury_report.pdfIn PDF document text
    • https://wuwexolajux.weebly.com/uploads/1/3/0/8/130814226/8fd4551259.pdfIn PDF document text
    • https://minoximamus.weebly.com/uploads/1/3/1/4/131437876/lapiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_604dde77b93d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffa1e93b9df4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420748/normal_60095070928cd.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/pirawavarikajokepev.pdfIn PDF document text
    • http://kebuwakuje.medianewsonline.com/steps_of_data_analysis_in_qualitative_research.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_6025bf78e1c20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapufebifuv.epizy.com/kejegexemerovegavaru.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/nitajilomodozopim.pdfIn PDF document text
    • http://gijurusekaluxir.epizy.com/manusia_sebagai_khalifah_di_bumi.pdfIn PDF document text
    • http://xesidif.epizy.com/96139504925.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/finding_gcf_and_lcm_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/ap_eamcet_2019_hall_ticket_date.pdfIn PDF document text
    • http://gowejolu.rf.gd/mystic_messenger_email_answers_star.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/24518635178.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_off0000f09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 5584 bytes
SHA-256: 6786edb592fc8fd693b36610da8759ff28698a8c0cb598eae265691379e65475
font_01_sfnt_off00010386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 10732 bytes
SHA-256: 3c0fbd6df45c66d97a14fecdc90789dbf0f71b153c067be981843c055398532f

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