Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cfa214f252a35fc…

MALICIOUS

PDF

87.2 KB Created: 2021-05-16 14:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 347f885ace57487df9219d5fbf5d0de1 SHA-1: abe6ed4417ada056f0e367a6ec0f09b803f373a6 SHA-256: 3cfa214f252a35fc0ca6bd757dadcde1780046b23ae9091781f08a70c5970fb0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://jottigo.ru/wb?keyword=snow%20white%20princess%20miku
    • http://buxewufa.iblogger.org/bladesmithing_books.pdf
    • http://midarujiwuvi.mygamesonline.org/75645618386.pdf
    • http://bobixina.getenjoyment.net/kivaleragodafarazam.pdf
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/3716019.pdf
    • http://mivejuvididu.66ghz.com/21005195819.pdf
    • http://nugawijuxuv.mywebcommunity.org/perafuzimolav.pdf
    • https://xabanovodo.weebly.com/uploads/1/3/0/7/130739860/waturozigajamobejivo.pdf
    • http://daxamel.mywebcommunity.org/philips_led_driver_price_list.pdf
    • http://parazepurafeza.medianewsonline.com/joint_venture_agreement_format.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nisarinu.epizy.com/academic_writing_genres.pdf
    • http://sizurixujiboxen.rf.gd/luggage_size_guide_for_international_flights.pdf
    • https://uploads.strikinglycdn.com/files/c460edd3-34f1-4338-8bab-394447c71d52/pukepe.pdf
    • http://nopawalaxuwaw.onlinewebshop.net/how_to_win_game_pigeon_8_ball.pdf
    • https://uploads.strikinglycdn.com/files/447d7224-860a-4578-8b9d-28ff490288ad/oster_6_cup_rice_cooker_recipes.pdf
    • http://tosabukevosubar.myartsonline.com/wuxuzuz.pdf
    • https://uploads.strikinglycdn.com/files/ba3ae1f7-4aad-45fb-aa84-24e07f956d23/how_to_fix_a_cracked_pressure_washer_pump.pdf
    • http://fejesaj.epizy.com/samsung_un32eh5300f_bluetooth.pdf
    • http://zugagib.atwebpages.com/perimivimaxafakenuw.pdf
    • http://muvemaxadal.onlinewebshop.net/angiosperms_vs_gymnosperms.pdf
    • http://zaniwogi.rf.gd/89001383997.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b7.bin
86a0bcdf8505a82a49502139dba45d13b302e6761742d3ab9dacc50a32186681
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 4680 bytes
font_01_sfnt_off0000f53c.bin
f4cdfb0b31f7f8a58afa36ed312c9207eb157886cca38eaf0e803b3600db9c1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 5072 bytes
font_02_sfnt_off0001065e.bin
f87d9f78a18186c0f09d77b9dd65e57e4142ed6a079cadbda187653ccb2238cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 10360 bytes
font_03_sfnt_off000129eb.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x129EB 16204 bytes
font_04_sfnt_off00013f19.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F19 4324 bytes