Malicious PDF — malware analysis report

Static analysis result for SHA-256 1274b3290da83196…

MALICIOUS

PDF

89.2 KB Created: 2021-04-04 21:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a13c2210f2145f7ddc50e1c1ca207131 SHA-1: 6050e2bd6a7b18582052b46de9ac291dc8383ac9 SHA-256: 1274b3290da83196815f4966e469be52eabf3faf38f896717a2dab1dc850f5e9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary focus on `https://resalured.ru/award?keyword=jane+eyre+penguin+readers+level+3+pdf`, suggesting a phishing or malware distribution lure. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` further supports this by identifying the PDF as a link farm on disposable hosting, designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=jane+eyre+penguin+readers+level+3+pdf PDF link annotation
    • http://specialsale.info/60461142482p0qij.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/84981532616or5ri.pdfIn PDF document text
    • http://okclub.org/150764366421l4mc.pdfIn PDF document text
    • http://matroskin.space/zawgyi_font_unicode_freeit43o.pdfIn PDF document text
    • http://mantenancie.com/go_away_big_green_monster_songem2w7.pdfIn PDF document text
    • http://saleproducts.pro/jebagobeburuwodugaz33kq3.pdfIn PDF document text
    • http://invitesistem.ru/hp_photosmart_plus_all-in-one_printer_series_-_b209_wireless_setupp2u91.pdfIn PDF document text
    • http://dobikan.22web.org/44204937642.pdfIn PDF document text
    • http://net-klientov.ru/hunger_games_catching_fire_full_movie_free_streamingp44cm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetusisase.rf.gd/37178582275.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/play_xbox_one_on_android_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0152e4aa-3c89-495e-a243-392ce41a073b/how_to_use_trade_options_on_robinhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455dc38b-6c49-4ad4-ac34-56983c1d670b/53576467476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad31a725-b98d-465a-bae3-2b5af47fb4d6/93746883052.pdfIn PDF document text
    • http://jujonejetas.epizy.com/furoxabulijitodeku.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/bajirao_mastani_tamil_movie_tamilrockers_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/28801720456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3102cebc-af80-4e14-be59-403c83deb554/how_to_do_la_noire_interrogations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acbdd19-3418-49b4-9884-65d6e6b71362/using_dx_lenses_on_nikon_z6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0993141f-0934-44f7-bb80-4021db2b1f3b/11652745127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abd8b5c-103d-453a-96c8-0ec3e696a318/banekesuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b5f294-cc39-415b-a0f9-540875f2b995/92445676930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9dfbbc-8909-4faa-bfd8-ad3c5c2b1587/83113935665.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 9012 bytes
SHA-256: d381887d6ab73db5b95b67c61f67f6797333331a63504e2755b61da695b00647
font_01_sfnt_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 5524 bytes
SHA-256: bd53edbb380c9268c3232ccf59770e6c9b8fa11858d335f3f9d9e5e5540e4d0b
font_02_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 12436 bytes
SHA-256: 89118e4c69771e22acdf922622b0861e43d071a10d88e8a7ce3059ff87a0df36
font_03_sfnt_off00014138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14138 16140 bytes
SHA-256: 3f83bbfb2e03141a9083badfb1da6e2b1773f9aa6b1ed8f30fc2d392a5ee3553