Malicious PDF — malware analysis report

Static analysis result for SHA-256 f272f4baee27750d…

MALICIOUS

PDF

97.1 KB Created: 2021-04-07 15:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 384ae4887e33b6cfdc1eb09bd0374657 SHA-1: dddb54d794d98d710b5158a049af01db15994ca5 SHA-256: f272f4baee27750d3fc8b7da95481a166345765e75e4d6973cec6b3d6e924854
186 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 0.9971

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://seumenha.ru/strik?utm_term=the+witcher+3+ps4+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/fosojatesog/gcghifJ/tekafodasi.pdfIn PDF document text
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/vinefogulas-posuvafekasaz.pdfIn PDF document text
    • https://jobavoxiduru.weebly.com/uploads/1/3/4/7/134722818/papiletetekop.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/24873592286.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/jbjfOgj/83287357112.pdfIn PDF document text
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/tafukalasisigasiri.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/kiiQp6V/gorillaz_feel_good_inc.pdfIn PDF document text
    • http://retamos.mygamesonline.org/how_to_open_jbl_clip_3.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/gciahjO/background_video_recorder_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/sasibasodiwu/YjfidgN/word_connect_crossword_level_96.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/digkhbV/ifly_520_gps_review.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/hjgiiil/kumubenemiwewejezuwum.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/hjlhghg/80132552677.pdfIn PDF document text
    • https://javufivupa.weebly.com/uploads/1/3/4/3/134349262/lujeruwex.pdfIn PDF document text
    • https://fibumexil.weebly.com/uploads/1/3/1/0/131070733/dijolovevob.pdfIn PDF document text
    • http://gexedufez.22web.org/honda_eu1000i_generator_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/lixepupo/jcjfgjW/piano_tiles_4_offline_free_magic_music_games.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/marcos_o_evangelho_dos_milagres_hernandes_dias_lopes.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/87129849467.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
    • http://rodiwube.epizy.com/96624325784.pdfIn PDF document text
    • http://fupazufeg.rf.gd/42535430240.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/what_is_the_meaning_of_star_crossed_lovers_in_romeo_and_juliet.pdfIn PDF document text
    • http://dizakopalelur.epizy.com/beeswax_sheets_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad5bc01-07e4-4f11-9c36-40e8e2ef5f42/xiromevufenupigofupavax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10d2ced-dfcc-48bf-81ff-42ab4954019e/21540388380.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001014d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 5684 bytes
SHA-256: a40fdeba6fe9990cf95c62f58adb945375ef8ba40fa171bc308e8e3105fb2c8d
font_01_sfnt_off0001151f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151F 5460 bytes
SHA-256: c1a447a4c4b3ada24f2f9c71a247ac7129509baa2d80d143414ed586f9a5dbcf
font_02_sfnt_off00012797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12797 11980 bytes
SHA-256: 74395aa79ed8b3deba122079091958055f84ad1ba3f5528ef9a7edc8c4da133a
font_03_sfnt_off00014ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE4 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0
font_04_sfnt_off000165ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165FF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333