Malicious PDF — malware analysis report

Static analysis result for SHA-256 9613f550faafa66e…

MALICIOUS

PDF

87.2 KB Created: 2021-03-13 17:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4171c10d6010a7fff856a00cc0360331 SHA-1: ee36d410999a9d6bc644e15549e7db1adae49943 SHA-256: 9613f550faafa66ee5f84cfaa105393e972970180268adb9f67ce4c8f8f8c182
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are likely part of a link farm designed to direct users to potentially harmful websites, such as the one at `https://kuzutuzo.ru/wix?keyword=mining+guide+ffxiv+heavensward`. The document body, though heavily obfuscated, suggests a lure related to 'mining guide ffxiv heavensward'. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=mining+guide+ffxiv+heavensward PDF link annotation
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/3158090.pdfIn PDF document text
    • https://nenawobu.weebly.com/uploads/1/3/4/1/134131353/2614038.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/vjbGhie/bare_knuckle_fighting_championship_12.pdfIn PDF document text
    • https://cdn.sqhk.co/jatizaru/ebv9PMJ/tazaser.pdfIn PDF document text
    • https://cdn.sqhk.co/gizulakofo/bgjf2pt/potion_explosion_6th_student.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fe12e1463303.pdfIn PDF document text
    • https://gajebafanagifim.weebly.com/uploads/1/3/2/8/132815836/lunisagekanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_603c1e7c3e417.pdfIn PDF document text
    • https://wipowolulufobud.weebly.com/uploads/1/3/1/4/131437369/sileki.pdfIn PDF document text
    • https://mikugixu.weebly.com/uploads/1/3/1/4/131438693/devujulunuvi-gavami-dujuniwomuw.pdfIn PDF document text
    • http://grantmedica.ru/mike_meyers_network_booka08xs.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/g08Ajem/sapajezuwamilodogaj.pdfIn PDF document text
    • http://wirelessinfo.ru/wibatugobobawog12eso.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/rubidokezive/cbse_class_12_accountancy_ncert_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/16967070237.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_2b98cd847eb24894bcf557d16edcdb01.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_c8f6f95d2473451caaf72ebef73ec6b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lupebesu/la_biblia_rastafari_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/good_argumentative_essay_topics_for_6th_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/sigurused.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_c8dd069c41f34b9aad63421c60bacf4b.pdf?index=trueIn 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_off000116f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F7 5364 bytes
SHA-256: 3568dec6fd3bfce5a9852fa69475a5d815b72d854e2493c6f566841359fcfaca
font_01_sfnt_off00012956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12956 11268 bytes
SHA-256: f8db83255f4dc32812b42bd6f7214fdc170671af375bf12ed52f3dc08f76c09f

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