Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8b9bb70a74dcd5…

MALICIOUS

PDF

93.8 KB Created: 2021-03-18 13:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4bdd358dedf50950e8b27bcd00e73989 SHA-1: 89501b619e89014813d65d8ada1672868dfaac3d SHA-256: 4e8b9bb70a74dcd53e29c88a4f94f4a7822841355a42496c5a84bb6d545bcd37
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, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/wix?keyword=learn+2+fly+2+unblocked+hacked PDF link annotation
    • http://fakts.design/cooking_merit_badge_workbook_answer_keyratil.pdfIn PDF document text
    • https://wopurosifagup.weebly.com/uploads/1/3/5/3/135333772/1248743.pdfIn PDF document text
    • http://blekrossi.ru/53661296769mrvd4.pdfIn PDF document text
    • https://wugedelujexot.weebly.com/uploads/1/3/1/4/131456191/daxudituma.pdfIn PDF document text
    • http://detonic-ro.website/55811459126wg5bu.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/eQhifhi/electrical_house_calculator_canada.pdfIn PDF document text
    • http://detonicufficiale.website/transparent_screen_appamef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_600aeb21d6630.pdfIn PDF document text
    • http://formverifiedbadge.com/71633748138s2cnu.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/YgdsHgg/78775137421.pdfIn PDF document text
    • http://fito4ka.xyz/learn_python_the_hard_way_4th_edition_downloadlg2eg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_603d0f998dd0b.pdfIn PDF document text
    • https://cdn.sqhk.co/ragekasa/jcgdihw/workout_log_sheet_template.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/gukanejanawojomof.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/IGiggfm/online_food_shopping_uk_delivery.pdfIn PDF document text
    • http://abwaab.su/tipozutepamuwivatekiix9bs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_6047376273f4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476437/normal_6007af0720468.pdfIn PDF document text
    • http://sosuziba.mypressonline.com/what_is_an_ecological_tipping_point.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/VgiXgFk/85927496284.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danebusuji.onlinewebshop.net/hp_pavilion_zv5000_ram_type.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
    • 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_off0000fd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD44 6628 bytes
SHA-256: 15fbc252006201866b17cc48ed095b3508cd6f74026e6132ec9a2093c156ac1b
font_01_sfnt_off00010da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 3204 bytes
SHA-256: 5faad3b60978e3e8951465e97e10b346a91bb375185c73986273a8d13818c8b2
font_02_sfnt_off00011911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11911 5308 bytes
SHA-256: bd5dea15ca48a4e519c00c3a46db5b3bf88e95c792ed9d5e8142996d01305676
font_03_sfnt_off00012b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B28 11604 bytes
SHA-256: 7888372aa3d93e44919ba1184c54c5ee40955d9beb082e5d3cf9e8a1f2162c49
font_04_sfnt_off000152fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152FB 16384 bytes
SHA-256: 7cb1c1fa23723d628426cea2e30f37b5759c3ebadb96025efeee9b83a9cfb90f