Malicious PDF — malware analysis report

Static analysis result for SHA-256 986b2dbc5e4a283e…

MALICIOUS

PDF

74.1 KB Created: 2021-03-14 17:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d9e796418646c1b04d2015c94f5d9989 SHA-1: cd9a1641a0767cd12fb5c9dcbd4512d6c24797bd SHA-256: 986b2dbc5e4a283e1a58ef5b96eb934a88030846e112601e5db498989e3fd07d
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, and contains a large number of external links, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt users to call a number in a deceptive context. While no scripts were explicitly extracted, the presence of numerous external URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=ntc+student+portal PDF link annotation
    • http://vufajed.getenjoyment.net/ballard_high_school_sports_schedule.pdfIn PDF document text
    • http://hurleyshamburgers.com/java_runtime_environment_8_free_download_for_windows_7_32_bit82nix.pdfIn PDF document text
    • http://radanews.site/autobahn_police_simulator_2_apk_androidvex4g.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/backlash_full_book.pdfIn PDF document text
    • http://salonhq.xyz/gorewezifufaborezobumq27a5.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/aerobic_training_program.pdfIn PDF document text
    • http://creamspait.xyz/maplestory_bowman_leveling_guiden247n.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/artificial_intelligence_tutorialspoint_free_download.pdfIn PDF document text
    • http://acgmgroup.ru/47114492108v7rio.pdfIn PDF document text
    • http://findattime.com/duladarejagudedakirixefen5td.pdfIn PDF document text
    • http://vovpomnim.ru/b_pharmacy_syllabus_2nd_year_201818p9k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_13f36534740b4ad2925d500061af3167.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jifesu/chevy_sonic_2018_owners_manual.pdfIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/94156263292.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/streaming_video_er_browser.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/tojowesokomoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/seguwesobuxujovunazoku.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_d0d8a802a0a440a59fd44e997be8eb1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/6038156332.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_4d50e72a8c7b4da9991845f31e2f6744.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/danobi.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_off0000dd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0B 5036 bytes
SHA-256: 838b24920e5ec69ddb0851bd2d9bd01f99a3acfbb871f20b7596bb184f849418
font_01_sfnt_off0000ee3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 14040 bytes
SHA-256: 7bd1bfadf33fc5d2989b80b6e0abcb300add3461205755715d17fe99e481eba2

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