Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff91802b6c3b91c…

MALICIOUS

PDF

87.6 KB Created: 2021-03-30 12:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 724df7c3b2a4cf0fa2259cd17198f3ee SHA-1: c20a6b5fe3c29eff7ae914428afee36cb5413fe4 SHA-256: 3ff91802b6c3b91cf3f54c66d1b9ab4be9bd4ea956603a79980ad08283ef8db1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9958

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 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.
  • 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://botokaw.ru/aws?utm_term=what+is+chance+2+dance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475375/normal_604f74e75a929.pdfIn PDF document text
    • http://fegovoze.22web.org/72457527942.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/iijZYji/huey_lewis_and_the_news_songs_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/aws74gh/just_dance_now_not_working_on_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/vexavudakepa/hdhcxcU/shoot_em_up_movie_review.pdfIn PDF document text
    • http://dwatches.site/fugofuririlimokavowal136t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_5fd112735ace9.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/dijZhfZ/online_video_slideshow_maker_with_music_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/Bjjchf1/lidotibarafigub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5fd1247ceea2d.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/6IFjgRf/funny_things_that_happened_this_day_in_history.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/fRhaCha/old_kpop_girl_groups_with_4_members.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/ijjcna3/bubble_gum_simulator_roblox_codes_2020.pdfIn PDF document text
    • http://naturwows.space/87199575423aafyd.pdfIn PDF document text
    • http://freud.icu/irish_boy_bands_1990s5ua0o.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457560/normal_5fc7338b19205.pdfIn PDF document text
    • http://choosemadam.site/video_calling_galaxy_s8_activespbbe.pdfIn PDF document text
    • https://cdn.sqhk.co/tonufipu/yif1Bgd/iowa_power_farming_show_exhibitors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459630/normal_6061153ddb14d.pdfIn PDF document text
    • http://bepeteferavo.22web.org/71030579352.pdfIn PDF document text
    • http://airbin.top/cisco_4742hdc_installation_manualw1b3j.pdfIn PDF document text
    • http://zedelonamigese.22web.org/wapurizuwezufifaxibad.pdfIn PDF document text
    • http://naturka.space/rovuxejusunavupamumupajiida8.pdfIn PDF document text
    • http://usesalon.xyz/where_did_the_math_term_pi_come_fromnbtw3.pdfIn PDF document text
    • http://italywow.space/bapelagovigalafeq9.pdfIn PDF document text
    • http://securityverifiedservices.com/how_to_install_rainforest_jumperoona3xh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000118f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 5044 bytes
SHA-256: cf3954ec0a6b73932935858057120bca37ff9cf056b0273bc0b8dac22b279b99
font_01_sfnt_off00012a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A26 11224 bytes
SHA-256: 23f30a757bcb419e2e793a3e2767657a689c42bcf1d35a3582944968c46fcb93

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