Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34340f0fe6a33c8…

MALICIOUS

PDF

74.5 KB Created: 2021-03-22 15:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5469ed9ee19e34611b614e8c744c61be SHA-1: 941e7ccc7739e9ce73ef9408debf68e7e7db278e SHA-256: d34340f0fe6a33c8d0dc710f545bf793432213fc222e41c400fb61a072db7719
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://botokaw.ru/wix?keyword=hive+mind+guide+terraria PDF link annotation
    • https://topagolidokade.weebly.com/uploads/1/3/4/5/134502990/8163476.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/b0gfjjN/how_to_iron_perler_beads_without_parchment_paper.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/how_to_pronounce_navajo.pdfIn PDF document text
    • https://dirifulezidume.weebly.com/uploads/1/3/2/7/132740871/8ddd2ee8c3db4.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/gfjbKhd/musica_de_los_80_gratis_para_escuchar.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/gjjjidr/2_player_skeleton_battle_royale.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/double_bollinger_bands_trading_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/4t9iaLj/hard_time_prison_sim_apk_full.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/hhg7jgT/history_of_thyroid_cancer_icd_10.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/mijumomub/puzilerojokagefolumanadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204b0e8d-5581-4246-a4a2-993a82203bf6/bivipovowijenenifema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ff6477-32e5-409d-9e97-fb6f01cf8e87/kimaso.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/pamiwogelidaxune.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/pegejatiwuxujakanetumuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/93020121433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db9dea4-bd19-4b21-8ca9-886b903e7e75/radunuvebusojavekigum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1e936f-d0ee-4b64-ad82-49d4b4dce98f/lutopegabuwisudalewar.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_off0000e8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 4956 bytes
SHA-256: c3888f70073245617ae98e2494a57da3ab5ed3f049ba7392bc355db760b93bc8
font_01_sfnt_off0000f9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A6 10244 bytes
SHA-256: bc23ae9f81a27276d34c74f83266b8bf392ff9a79465bb465e2ddb53ed3b54b9

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