Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2cfd970f925453…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 03:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a7c0a0ca68ab9745b9d47cb3e23f4d6 SHA-1: 13f59ed3b2711032b42016ee77fd7afacbf6af5a SHA-256: 8d2cfd970f9254536a0928acf599df52bf3a066c51bfb35e8a9d0a986ac652da
156 Risk Score

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-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://fokemale.ru/strik?utm_term=what+type+of+juice+for+mimosa PDF link annotation
    • https://polidixixav.weebly.com/uploads/1/3/4/4/134467230/badb6ca279aafb5.pdfIn PDF document text
    • http://7gusevshop.space/adjective_list_free13jq8.pdfIn PDF document text
    • http://ighelpcenter.xyz/love_you_crazy_country_songomz4b.pdfIn PDF document text
    • http://poradoit2.site/wazasusegezejuphl7m.pdfIn PDF document text
    • http://asta-stroy.ru/harry_potter_free_printable_stickers6aef0.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/rebebusenukimob.pdfIn PDF document text
    • http://zanartcc.net/danavupunowezrhys2.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/xilasisefi/buzikomalujebirazijawunu.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/fekojibuxil.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/how_much_is_a_pallet_jack.pdfIn PDF document text
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_e057e9ed84eb44d6b84c71683be39fbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/3323139218.pdfIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_8b3618b288db4240b514f5ef02a6edc9.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_2a6e99ee7cee40da82cd18dfa950423b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/barayti_at_rehistro_ng_wika.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/doxujiximitunirazijejamux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 5416 bytes
SHA-256: 36adb7ea35ee0d2c1d2fd798bfc0abdf9e3a0c137a1b2a387c59928d0bcd193e
font_01_sfnt_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 10748 bytes
SHA-256: a58c283c0bafc247824b14190b155e519c4f5257a55905844b7bdd63c2643890
font_02_sfnt_off000111e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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