Malicious PDF — malware analysis report

Static analysis result for SHA-256 4078874ddcd10a0a…

MALICIOUS

PDF

74.3 KB Created: 2021-01-14 03:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7ebf36afee02aa2d07c68e6f15ebbc19 SHA-1: 159876153542880b92bac3c3d43598a3cc7bf6b3 SHA-256: 4078874ddcd10a0a97df95750cab1d8067577b011f6a2fa9417e6bdae41aeed8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. One prominent URL, 'https://traffnew.ru/123?utm_term=total+war+3+kingdoms+building+guide', is presented as a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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 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.
  • 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://traffnew.ru/123?utm_term=total+war+3+kingdoms+building+guide PDF link annotation
    • https://site-1178836.mozfiles.com/files/1178836/lejidogesimogize.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomekurufe/1wp1Eha/gmail_app_password_recovery.pdfIn PDF document text
    • https://site-1176683.mozfiles.com/files/1176683/pentagon_mall_haridwar_map.pdfIn PDF document text
    • https://site-1178369.mozfiles.com/files/1178369/v4_multimedia_platform.pdfIn PDF document text
    • https://site-1174729.mozfiles.com/files/1174729/tufomus.pdfIn PDF document text
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/8324811.pdfIn PDF document text
    • https://site-1223236.mozfiles.com/files/1223236/super_monkey_ball_gongon.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/mufukep/what_is_an_environmental_system.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/ankara_metro_map.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/dtvp-_a_sample_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/zepususasiwupe.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/78193135378.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/xusazogenebokatin.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_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 5552 bytes
SHA-256: fe727dea89fa91d6e4f48b622ab2cb7e36f23e97e06ca39e4d17a2d2508f6130
font_01_sfnt_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 10296 bytes
SHA-256: 5710b218e21619f4b0b56a2a53793c9292a0a7544c3a41bbff215541d6cc4eb1

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