Malicious PDF — malware analysis report

Static analysis result for SHA-256 f754e317bd2eb57f…

MALICIOUS

PDF

87.0 KB Created: 2021-01-30 05:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 106f3c4bed56cbabb9513352edcbd098 SHA-1: 9184763a12f4db57a4d8628ab987e935c5e81991 SHA-256: f754e317bd2eb57f085ab9ce83fc4d100074c5141d3e4940973007155e74f92a
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a site offering 'zombie shooting games mod apk'. This, combined with the ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The heuristic 'SE_LOLBIN_RUN_COMMAND' and the presence of embedded URLs further support the malicious intent, likely to redirect users to compromised sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/aws?utm_term=zombie+shooting+games+mod+apk PDF link annotation
    • https://cdn.sqhk.co/ranotigu/ejaqWMK/maxeju.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/IRcgdlV/43046290160.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/jewgci8/545135999.pdfIn PDF document text
    • http://dugules.iblogger.org/trainer_borderlands_2_goty.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/gwJ8Igj/93511079420.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/ojahj3j/ufc_253_results_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/e4c5FOE/black_men_s_hair_curly_short.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/bifizixapoz-xasivobafetizal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pisedij/mejosadevanixoj.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/video_facebook_private.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/cambridge_igcse_english_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/navy_btech_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/sujafupeviwedug.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/fejonewo.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/c_forward_declare_typedef_template.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/forensic_audit_procedures.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
    • https://s3.amazonaws.com/janodojivi/forensicIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB0 5192 bytes
SHA-256: 8a2cf57a913b9a4d76a7b5fada26dcc7623451471792cac8acd254f630567a7c
font_01_sfnt_off00011c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C36 10700 bytes
SHA-256: 93d3fb146fd446907074f35106d2f15040fe6a68b1bfea4d8b566b589a6f30c7
font_02_sfnt_off000140cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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