Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c99ceb13719f7b…

MALICIOUS

PDF

121.1 KB Created: 2021-02-09 06:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fd782c35c54d493f5f082a09b76fc767 SHA-1: e61a7c2ca287a5d0fdb1d03d4ba30f85614f83a8 SHA-256: 54c99ceb13719f7bae1ab2c20d43c4b8a924b7acfec63f26b9f4694459df884c
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'IMF report Venezuela inflation', likely to entice users to click on malicious links within the document. The presence of multiple external URIs and the link farm heuristic indicate a strong intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=imf+report+venezuela+inflation PDF link annotation
    • https://cdn.sqhk.co/mifigatira/hghb175/elite_killer_swat_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/ehbIBih/piano_game_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/heLTcgg/31175117588.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/zcqjhgf/how_long_to_bake_pork_chop_tenderloin.pdfIn PDF document text
    • http://dutusejutax.22web.org/77844064220.pdfIn PDF document text
    • http://verifybadgehelp.com/xuzidiwuvijazowozorzoozh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxipobusevive.rf.gd/welizuworasekuzoladevoxot.pdfIn PDF document text
    • http://tejutavufoxif.epizy.com/61255665755.pdfIn PDF document text
    • http://fexojuvaf.rf.gd/nuzolatalirorujox.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/lizaromukuvimiguzubes.pdfIn PDF document text
    • http://jubadoloje.epizy.com/string_theory_math.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/faxerigodavabijikilemajir.pdfIn PDF document text
    • http://verirajoxa.epizy.com/17339540293.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_off00019cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CAB 4916 bytes
SHA-256: ebce40c07494a098cb6735bf63fd6e7f6dd1afa285b86fbdc8c691bac9625b73
font_01_sfnt_off0001ad5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD5D 12764 bytes
SHA-256: 7d85879b5d0d618a59fc7434f4d0165de876d9d708d1170bd0a000427fcf7fb3

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