Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5493535a96bc342…

MALICIOUS

PDF

86.7 KB Created: 2021-03-04 02:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4279f853e1cece6a66c3d4c2cb8b81c7 SHA-1: 19980cc053bc2281df688461d078ec1636468496 SHA-256: d5493535a96bc342ecfc14b87abc4e6fc45493388183826bf7dc6a935c682e76
146 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic firing for a 'link farm' suggests a tactic to distribute malware or phish users. The 'SE_ENABLE_LURE' heuristic indicates the document likely prompts the user to enable content, a common social engineering tactic for malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://xajibur.ru/award?keyword=management+style+quiz+printable PDF link annotation
    • http://sugameloxufe.mywebcommunity.org/should_i_go_to_disney_world_in_january.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/lewuzufukewijuvoluluzate.pdfIn PDF document text
    • http://drawer.icu/matchington_mansion_cheats_level_4446dzo6.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/jvAejh5/45540370408.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/expository_essay_thesis_statement_examples.pdfIn PDF document text
    • http://deutschebank-meine.com/los_tipos_de_esquemas_que_existentixwj.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/15700271038.pdfIn PDF document text
    • http://vanlit.ru/refegolonevunobibalxu9t3.pdfIn PDF document text
    • http://7lessons.fun/house_cleaning_roster_template6pzq5.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/2pje3jf/msx_2_emulator_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/N5Tja5Y/43039942133.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/hchdvhj/ualberta_calendar_mechanical_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/S6lwuV3/copper_price_live.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kotidaw.epizy.com/japojapukotik.pdfIn PDF document text
    • http://pupitudaxomibi.epizy.com/topaguwelikawusegexameno.pdfIn PDF document text
    • http://wonitijaxexilo.rf.gd/woocommerce_checkout_form.pdfIn PDF document text
    • http://fefeseriwumasu.rf.gd/animasi_bergerak_untuk_powerpoint_gif.pdfIn PDF document text
    • http://kulekewu.rf.gd/bakos.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/95367545378.pdfIn PDF document text
    • http://jifusewu.epizy.com/a_pieu_nonco_mastic_daily_sheet_mask.pdfIn PDF document text
    • http://lowazuxakosilal.epizy.com/gafuripij.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001173d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173D 5560 bytes
SHA-256: b4e4c4d7081ba240ea1ca57fb78bf0e2e8d7f4909337a62205b0bd50626287fc
font_01_sfnt_off00012a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2B 10252 bytes
SHA-256: 993ac1542f6ea86b7338b6cc941234be97f804efcc6b0843747a83fe075956d4

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