Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f966e44a154f70a…

MALICIOUS

PDF

71.9 KB Created: 2021-02-14 22:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd784359900f191fca9e077a8b1e5e94 SHA-1: b17b8ed579874390df8c1e1d43e857427a660c6c SHA-256: 4f966e44a154f70a11b1e1317dec38d68089e1220b5d678d70dd4c265327f6dd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing. The embedded URLs suggest a tactic to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jottigo.ru/wix?keyword=words+with+h PDF link annotation
    • https://cdn.sqhk.co/sipebililofo/1higigi/verklempt_meaning_in_english.pdfIn PDF document text
    • http://rowokalasi.iblogger.org/12916263709.pdfIn PDF document text
    • http://kernig.store/scott_cunningham_book_of_shadowszxz32.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/n33MPid/realpolitiks_new_power_review.pdfIn PDF document text
    • https://tagebukolili.weebly.com/uploads/1/3/0/7/130776523/fenewosogokaxanolaga.pdfIn PDF document text
    • http://limons.space/rijujasexamudi7nra.pdfIn PDF document text
    • https://cdn.sqhk.co/roziguze/fhd0aU3/dragon_goggles_x1.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/gf5GCib/6294151279.pdfIn PDF document text
    • http://bloodcraft.online/mcgraw_hill_texas_algebra_1_answersuqijw.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/chfQihp/launcher_hijack_clone_mod.pdfIn PDF document text
    • https://tixusevonatafix.weebly.com/uploads/1/3/4/6/134611731/mararemewifujax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://balunepikejevo.rf.gd/elder_scrolls_online_xbox_one_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/template_builder_online.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/37607411914.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/bit_torent._com_free_for_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/97688004695.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/outlook_2016_pictures_automatically.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_off0000dede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDE 4776 bytes
SHA-256: 8c5d7f0c7975b6a1ef3c3d83f37260a9a2f18d6ef76bb0523a184298a17accd3
font_01_sfnt_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 10504 bytes
SHA-256: d30ed15030f786c418997d2e47ddb3f06d637ed1862a4447d1334775214e6180

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