Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e68b7b9b03af37…

MALICIOUS

PDF

76.1 KB Created: 2021-04-13 07:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 73646278f55d980799afcc11967ce39c SHA-1: b717f70e52d0028c46f3122b34af7ccf4b23812a SHA-256: d6e68b7b9b03af3750f988d1111d3b070227482e04a4ed4530eaab2104d4ea9a
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=logitech+mk320+wireless+keyboard+and+mouse+drivers PDF link annotation
    • http://larebalin.mypressonline.com/can_i_get_a_covid_test_in_georgia.pdfIn PDF document text
    • https://nexojirinetu.weebly.com/uploads/1/3/1/1/131164364/9608851.pdfIn PDF document text
    • https://cdn.sqhk.co/bofilewidil/jgJpgeQ/89295722416.pdfIn PDF document text
    • https://wudusalulolatus.weebly.com/uploads/1/3/1/6/131606476/mibajotanepagal.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/30056556916.pdfIn PDF document text
    • https://zisibunekotif.weebly.com/uploads/1/3/4/9/134902626/jasowasisilijilezat.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/i4hdwgf/subway_princess_and_cat_runner_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/YhdL0ig/memibawik.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/4646943.pdfIn PDF document text
    • http://pestore.pro/champion_dual_fuel_generator_9000xmyvh.pdfIn PDF document text
    • https://cdn.sqhk.co/bitulore/eGhaRq5/como_se_dice_ranking_en_plural_arroz.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/tabitesasegebu.pdfIn PDF document text
    • http://brightshopbg.xyz/81796804590pe5jq.pdfIn PDF document text
    • http://ital-tess.space/free_heart_clip_art_black_and_whitex8fzg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/metakibeme/aqualink_rs6_upgrade_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/contractions_worksheet_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/porque_el_autor_escribio_el_lazarillo_de_tormes.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/financial_controller_salary_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/video_er_online_url.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/88136214137.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/rajixelefavezuwodemaxu.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_off0000e792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 6188 bytes
SHA-256: 89c24769eeedd40f74b95310821db4331de431b81c4054d51d200ae1a0ae95b7
font_01_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 11260 bytes
SHA-256: 09717805463531368cd3fdd5b643949c090131ec80f544541b512299c5ed79eb