Malicious PDF — malware analysis report

Static analysis result for SHA-256 561352443fe68b7d…

MALICIOUS

PDF

91.4 KB Created: 2021-03-11 02:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e9116b46a635d90832a4ad299e6fff SHA-1: eac8823238c5b8cdce36a442b0b092b1e6f7f8d4 SHA-256: 561352443fe68b7de4d16fcd09a886da11ec4c4b3fd8b660e4507811aa00e9b5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous external links, many of which point to potentially malicious domains, suggesting it's part of a link farm designed to redirect users to harmful content. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=tadabbur+al+quran+english+pdf
    • http://lulopoboxefon.scienceontheweb.net/all_my_friends_are_still_dead_book.pdf
    • http://fosavaxenu.mypressonline.com/44550075249.pdf
    • http://tigafik.mygamesonline.org/how_to_eat_move_and_be_healthy_download.pdf
    • https://wigubidukes.weebly.com/uploads/1/3/1/6/131606651/6694323.pdf
    • http://gopidap.scienceontheweb.net/why_is_the_press_called_the_third_estate.pdf
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/2d9e372.pdf
    • http://kenugizi.getenjoyment.net/12998821494.pdf
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/e14a2ebe02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_6f01b5d47695424889f443aca3febe04.pdf?index=true
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_229ad95f04d34de5825c666337b91b97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0c010c0d-8bcc-4b73-a370-16953537fd20/semigisu.pdf
    • https://uploads.strikinglycdn.com/files/5423049b-5eee-41dc-98b8-eed8eb34eca9/warcraft_3_remastered_review.pdf
    • https://s3.amazonaws.com/wixamupelinere/adapter_android_to_tv.pdf
    • https://uploads.strikinglycdn.com/files/34ad54cd-4fee-489a-9178-5f68a45d717e/black_and_tan_mini_dachshund_puppy.pdf
    • https://uploads.strikinglycdn.com/files/307c40a6-b2e8-4b83-84a3-61b29669e888/how_to_install_keurig_water_filter_k_supreme_plus.pdf
    • https://s3.amazonaws.com/wazotojemov/cnbc_asia_reporters.pdf
    • https://uploads.strikinglycdn.com/files/5dfd532a-4693-4582-9ed4-00947249d833/fortnite_is_it_suitable_for_a_10_year_old.pdf
    • https://s3.amazonaws.com/sabegokek/breeding_guide_pokemon_y.pdf
    • https://s3.amazonaws.com/xijalovelokolep/swot_template_keynote_free.pdf
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_09c51d6cb9fd4c9bb863dc839cec0323.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5e71e231-630b-4cbd-9128-cb264870d900/the_indian_vegetarian_cookbook.pdf
    • https://uploads.strikinglycdn.com/files/69359c72-0775-4097-a189-fd22c30c6f12/safujopipez.pdf
    • https://uploads.strikinglycdn.com/files/0d79db4c-f3a3-48ef-95c9-7ae0f4c01efc/how_to_pair_a_soundbot_speaker.pdf
    • https://uploads.strikinglycdn.com/files/069968f8-39fa-43f4-be03-d41617841592/69925450731.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001423f.bin
a12894052779ac031934532d866ceb530803ef5095837e58d0d3484f6b6d4509		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1423F 17612 bytes
font_00_sfnt_off0000f772.bin
4be1e6352eec5e50790d040c5811efdbf591d3a7d52069ad5c5cef395ea6f639		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 2872 bytes
font_01_sfnt_off000101ae.bin
fe008c3eb730ddb268e23754fcc7ed1688abf0d6174790afd9f7e62a5586f72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AE 5516 bytes
font_02_sfnt_off00011455.bin
8beedee9b20a7ba4d7794b89f4d41e0482d4934bab6f76283e5abfc2968d0712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11455 14508 bytes

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