Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac439cb20746b6c0…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 02:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 11c7539b8c40e591241e55b6c7507a00 SHA-1: 81bcbe1c362a29430d6fd76be1919e414803e7ba SHA-256: ac439cb20746b6c0bb97bd4bdab84b8f9b93906bca9681a67528e0356aadf2c4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://fokemale.ru/wix?keyword=sparco+car+seat+philippines PDF link annotation
    • http://povar2020.site/94573910314llawy.pdfIn PDF document text
    • http://dorightschool.com/luguworotikedekuvuwotnj84r.pdfIn PDF document text
    • http://nudistoff.club/around_the_world_in_80_days_chapter_1-5_summaryru3vd.pdfIn PDF document text
    • http://vizionsmc.net/how_can_you_describe_a_laked2ssb.pdfIn PDF document text
    • http://sparzha.club/esl_free_online_reading_comprehension_exercisesrda9n.pdfIn PDF document text
    • http://imkl-checker.com/75730711181v8ifg.pdfIn PDF document text
    • http://mishabelle.ru/nc_drivers_license_number_formatiwdf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_075286a523604880a3cf74d3c4a4c957.pdf?index=trueIn PDF document text
    • http://voxavupe.epizy.com/aambala_movie_pasangal_nesangal_audio_song.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/keller_williams_real_estate_agent_training_program.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/airport_extreme_manual_2014.pdfIn PDF document text
    • http://rabopusafat.epizy.com/xugiwuwugezonomulufupo.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/50794159048.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_3f066e2726724c8a8350af726898d585.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebokizez/lovetivavutajuwudem.pdfIn PDF document text
    • http://bumumewevebav.epizy.com/binomial_theorem_worked_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/oil_change_ariens_deluxe_28_sho.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_0638fc08d8184c7a9d73c194f1c3242d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/ikea_black_queen_bed_frame_with_drawers.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_off0000ed58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED58 5124 bytes
SHA-256: a52b9ede4d694ef1006f27bd52356f37a4cdf60a4c80bafb4aaa9ee4e754cfab
font_01_sfnt_off0000febd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBD 10876 bytes
SHA-256: 1f05316c89c7db83bcbd9f78927f4cd98fb69b1c1b4ad3706c8e55e6ef6f2e82

Open this report in the interactive analyzer, or submit your own file for analysis.