Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc708e18223dfd6b…

MALICIOUS

PDF

83.5 KB Created: 2021-03-10 23:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ed7ef4eddc1f809cbbe21cd9f1102f29 SHA-1: 3e7645072b89ca6eeba4136d18c2891ac2fc44bf SHA-256: cc708e18223dfd6bd0a1dae03cac80a5733a1de24a1ebc57811c3608c9b6e452
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 0.9990

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 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://gimoguvi.ru/award?keyword=beauty+tips+in+marathi+pdf PDF link annotation
    • http://lodixewovufosa.iblogger.org/xujurisiketani.pdfIn PDF document text
    • http://goloszauniver.fun/34122211568mzpgb.pdfIn PDF document text
    • http://universal-kirov.ru/canli_tv_app_androide6lzf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474478/normal_5fc8aa446b560.pdfIn PDF document text
    • https://cdn.sqhk.co/roduxokixuzi/eicHfPC/76555023392.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/hghf7ww/mario_kart_tour_friends_id_list.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/gi6pigu/avg_mobile_antivirus_security_pro_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_602da37f5ae10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5fe5642c5a6af.pdfIn PDF document text
    • http://legendarycraft.ru/buvumeledutubewoviziraglyih.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/yXdhagh/dasapuwizibi.pdfIn PDF document text
    • http://my-favshopf.online/lejuwijofunojezosezozipidehe3x.pdfIn PDF document text
    • http://wuxapogetal.iblogger.org/a_court_of_thorns_and_roses_movie_script.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/aijdYf1/sujadodejesidopejodila.pdfIn PDF document text
    • http://theplafond.xyz/zuvereninyhnxz.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/d9NJuZa/good_80_s_disco_music_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5fe1cef47d2a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://donixug.epizy.com/taurus_g2c_and_g3c_comparison.pdfIn PDF document text
    • http://wivowutone.epizy.com/garden_answer_planting_tulips.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/english_grammar_test_intermediate.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/honda_crosstour_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/70383423970.pdfIn PDF document text
    • http://noborixujap.epizy.com/navy_radiology_tech_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/is_a_kindle_better_than_a_fire_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/90824222997.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 5400 bytes
SHA-256: fc1fb17328e035f3585f0b756277013cea3b07662852d8f69c232890d3452167
font_01_sfnt_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 10028 bytes
SHA-256: df4f11d879771cdc1302f748eae75b8f5a2c94f878db646b5be82e24c3399f5d
font_02_sfnt_off000122ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EC 8832 bytes
SHA-256: e240ac3491845e864e418184ec5fedac6b9cd37c97990d327f1b8dc0bf0295ef

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