Malicious PDF — malware analysis report

Static analysis result for SHA-256 0305beb06db1ec5f…

MALICIOUS

PDF

91.7 KB Created: 2021-03-24 19:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 32b2c9946cf05e35b516e596486ba12d SHA-1: 0e18efb6d0ba4a0c42f5d7218c0109cb0412a623 SHA-256: 0305beb06db1ec5f3270ec2768712475f9911e33388c77a9528a10b95e5d461a
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 to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/123?utm_term=evaluating+logarithms+worksheet+precalculus PDF link annotation
    • https://cdn.sqhk.co/kaxejelun/7Hgt7ii/store_manager_position_interview_questions_and_answers.pdfIn PDF document text
    • https://webimilosajepi.weebly.com/uploads/1/3/4/8/134859137/tirufadulapikipuxil.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/20241447869ogkl1.pdfIn PDF document text
    • http://sadovik.me/nixajogikazutojezojowokepu1j4.pdfIn PDF document text
    • http://instofficial.online/77234032114r4yn9.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jN5DAia/kozaxukenozozabi.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/1759710.pdfIn PDF document text
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/pefude.pdfIn PDF document text
    • https://rezodipegizosif.weebly.com/uploads/1/3/1/6/131606434/490804517a46.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/xawuforar-xuxolaritaboru-segesuka-wavilem.pdfIn PDF document text
    • https://fomimelagesuto.weebly.com/uploads/1/3/1/4/131406840/12f22272.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/rafanekin-tiwesimepame-pomokasexazuta-tewoxibi.pdfIn PDF document text
    • http://useporte.xyz/voponifened5twdx.pdfIn PDF document text
    • http://sarhello.online/mupovuwaterarajazojd75k.pdfIn PDF document text
    • https://wiromokuxuzub.weebly.com/uploads/1/3/5/2/135298753/2715e8955c.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/a92316f78a3fdf.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/jivuxo/43491124030.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/financial_institutions_markets_and_money_11th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/39356343948.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/what_games_are_included_in_atari_flashback_classics.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/1st_birthday_invitation_card_format_marathi_online.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10618 3664 bytes
SHA-256: 385aa601cd9570649487bee0c7e2e133820de0bddee45dac194a55eccc3cbba4
font_01_sfnt_off00011225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11225 5520 bytes
SHA-256: 08d553510fb680071f601807da9c164b9a2978e0aab594f17d26aab5843a9ea8
font_02_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 11160 bytes
SHA-256: 83ab55262a5d67a8273dcebf365c83caa8c20922154bd6d5908e578568816792
font_03_sfnt_off00014b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B30 16128 bytes
SHA-256: bfd634d3712c487d932e69a042cdf52523effffc397806a4650b0c914fa2b1d4

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