Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7a4a973d4b76ba…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 18:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d36909ddc66a50693e6d52a727c0fcf6 SHA-1: 4c760c0d1f8f460604003f94dd4cf55b0accbf09 SHA-256: 2f7a4a973d4b76bab592ac29286ed24ecb1d526c1c755a3ffe3c32ab9ce3e8ce
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://xezojetit.ru/award?keyword=talk+about+yourself+in+english+example+pdf PDF link annotation
    • https://cdn.sqhk.co/sunidoxil/jjgfoii/pongo_and_perdita_sing_along_songs_vhs.pdfIn PDF document text
    • http://creamwalls.space/pre_algebra_with_pizzazz_book_bb_answer_key72yk3.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/itjfMuk/38598489841.pdfIn PDF document text
    • https://cdn.sqhk.co/mojubemuwek/R7cCIij/vijirajixinejawugasupegog.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/RQhgVif/ice_prince_top_songs.pdfIn PDF document text
    • http://inertbhjbj.ru/pajipolagapepelotol0jrh.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/ngjcJfC/park_it_management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/what_is_the_fourth_of_july_to_a_slave_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958cc17c-1603-4c72-b485-9273e53d0a1f/2016_harley_davidson_sportster_48_service_manual.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_a843b893b8544338b3650fa08db5a55f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/lol_swain_guide_s9.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/valuxekox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e5792e-ce7b-4e80-acb2-e5eb703a580d/cant_stop_wont_stop_concealer_beige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52edc549-17e4-416d-85a0-220e26a77047/vuxogina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee950ed-a19a-4245-91ab-b80f329413e1/business_communication_today_pearson.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_619ac7d4b5a34acba744d684d990f8bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6485d8-543d-4001-b994-3f338a8f8f32/how_many_pages_are_in_keeper_of_the_lost_cities_flashback.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 5660 bytes
SHA-256: d8e6fa335a69ed4da904d3bd82f4a0ed772ec91e49c2abc1a94132c19711292c
font_01_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 10608 bytes
SHA-256: a1568d10f5237539cfb89d8faf32aa0928df974151bbf95ffdb1223249abf9b7
font_02_sfnt_off000117cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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