Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a499b090bf5fdf…

MALICIOUS

PDF

79.1 KB Created: 2021-03-31 15:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 756e252a29ddf8a06dcf04eea966310a SHA-1: d179bbf2ece19846d350c875319bd1e804168706 SHA-256: 00a499b090bf5fdf6f7c6993fe6be9dd458f6ff496bc0d88b0e03b24e9fbbeec
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detection and ML classification further indicate malicious intent. The embedded URLs likely serve as lures to malicious sites or to distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/award?keyword=cva+bleeding+adalah+pdf
    • http://dipunag.getenjoyment.net/neurofibromatosis_type_1_and_2.pdf
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/1421922.pdf
    • https://cdn.sqhk.co/tasokuxu/9Wdhajg/qr_code_scanner_samsung_j7_prime.pdf
    • http://kigumelez.medianewsonline.com/17886450101.pdf
    • http://lemakomude.sportsontheweb.net/axe_fx_ii_xl_vs_helix.pdf
    • https://cdn.sqhk.co/gusiloxi/ijFjiij/nuxubu.pdf
    • https://pubepisun.weebly.com/uploads/1/3/4/5/134594909/xoledajolo.pdf
    • https://woliwaluv.weebly.com/uploads/1/3/4/6/134686062/775275.pdf
    • https://cdn.sqhk.co/wejoladixuso/2jbia2l/fovivuridaxutixuj.pdf
    • https://cdn.sqhk.co/sugefixa/icXsfig/samsung_s9_my_files_app.pdf
    • https://xobiverubagosag.weebly.com/uploads/1/3/4/7/134711173/folawiwiw-gonikotibis.pdf
    • https://cdn.sqhk.co/gusisitixinu/hH1c2Cm/doodle_alchemy_cheats_animal.pdf
    • http://zekofurul.iblogger.org/50209885564.pdf
    • https://cdn.sqhk.co/kufejeni/sjghaii/luxury_daily_deals._shopping_app_brands_stores._com.pdf
    • http://fudazozotakaxal.mywebcommunity.org/xiwifigunerutomipedu.pdf
    • https://cdn.sqhk.co/xegunorasu/jjgjhfL/glory_betting_tips_correct_score_apk_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jilutuve.rf.gd/microscope_labeling_lab_answers.pdf
    • https://uploads.strikinglycdn.com/files/323c7bb1-3b1c-4e81-bc06-72cab02962e2/54421322734.pdf
    • https://uploads.strikinglycdn.com/files/56285894-f254-479e-b177-9e62a49c81b7/naram.pdf
    • http://kasegame.rf.gd/setiselosijuliwimafisu.pdf
    • https://uploads.strikinglycdn.com/files/173f9c26-58f0-420a-b6d3-5d976986eb73/hp_officejet_pro_8600_plus_printing_black_lines.pdf
    • https://uploads.strikinglycdn.com/files/e03f29d6-2e8c-4559-a457-4c0bd4bf5a9f/dugukopunugoxawal.pdf
    • http://kibesana.epizy.com/pierre_bourdieu_key_concepts_michael_grenfell.pdf
    • http://tuzuxutetug.atwebpages.com/xatapojudofitif.pdf
    • https://uploads.strikinglycdn.com/files/5c45f08d-1dc0-4c73-8e9d-7bc1c31b1f38/send_html_code_in_textarea_to_php_via_form.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc32.bin
91646e36e6ca5c4673fe35ce27d1865194a73d82fed885b909251ec143614105		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 5136 bytes
font_01_sfnt_off00010dae.bin
86253ba6726df4826c33311ed6514260e8baf2585e40087f5c10bff98b7eedd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAE 10576 bytes

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