Malicious PDF — malware analysis report

Static analysis result for SHA-256 342b6064bc4c5c27…

MALICIOUS

PDF

93.6 KB Created: 2021-03-27 21:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 81c53d12544ae95d506c70afb81b9325 SHA-1: cee91c5d746be7b0536e8138b1963e02a86846da SHA-256: 342b6064bc4c5c2718394f162c728c0b47cfcf45f7ddc62319836e43459626cc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, https://maypoin.ru/wix?keyword=esposa+de+marco+antonio+solis+actual, is likely used to redirect users to malicious content. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=esposa+de+marco+antonio+solis+actual PDF link annotation
    • http://mumolazesinidix.getenjoyment.net/zojepeled.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/sokidimaname.pdfIn PDF document text
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/vedufusudu_vakexenow.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/ijieXKk/top_ten_best_arabic_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/yujKCjc/89104194760.pdfIn PDF document text
    • https://cdn.sqhk.co/dokamaruxif/a2xhdHZ/burojaxisixufupizutusu.pdfIn PDF document text
    • http://fonexewof.mygamesonline.org/bc_caste_list_in_ap_telugu.pdfIn PDF document text
    • http://juilopkiretlo.ru/starbucks_menu_prices_philippines06x77.pdfIn PDF document text
    • https://ziregorex.weebly.com/uploads/1/3/5/3/135351653/6996190.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/idjhaIu/ceramic_tile_art_supplies.pdfIn PDF document text
    • http://burrrhey.tech/circle_worksheets_for_grade_4yqh5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonanikapudidak.atwebpages.com/belkin_ac1600_db_wireless_router_model.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/15418539382.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/barbie_doll_new_game.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_5dfd5ffb527e48f797c9b37fc9a54500.pdf?index=trueIn PDF document text
    • https://79ab8074-8148-4faa-9219-f6cdfa35bc15.filesusr.com/ugd/99e004_1f2fb8b9079f423898b2fa11a20b7e2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/saxefi/type_2_diabetes_statin_guidelines.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_fbe61257f38544c0bc129a52285faebd.pdf?index=trueIn PDF document text
    • https://aa3a3cfc-94e2-4180-8c40-d7fec061c006.filesusr.com/ugd/e5a943_a4f7b0ad950d430cb49a0ceec2cb5a88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remavuj/project_almanac_full_movie_480p.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/zakolanuvixizewejef.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_7deccde6aec9403f93db82513a610e76.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000fbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 5176 bytes
SHA-256: 43e4ce1af4995cff55406f6b965c32cd5687dba31e9f1407a982b7ee471ece51
font_02_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 8168 bytes
SHA-256: 8c683c40287f4da06b8378f0b1260be8d3c73eeb61613dfef41a7ac210416b25
font_03_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 12360 bytes
SHA-256: e5703462813b51d78447af31fc92d55b31826bb86a579b7fd67f9a552ab7b8eb
font_04_sfnt_off00015104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15104 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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