Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e582b35a5545698…

MALICIOUS

PDF

78.4 KB Created: 2021-04-07 11:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b53da6959023788e27b957aa55475cf5 SHA-1: cff5a7f90bb34d92ff32a18cf0157896ed38fa25 SHA-256: 1e582b35a55456983220868c2d6bf177305b8e43a6e5127815cd0929dbdd25ba
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 0.9992

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://fokemale.ru/123?utm_term=chemistry+worksheet+limiting+reactant+worksheet%2523+1+answers PDF link annotation
    • https://cdn.sqhk.co/rogenujudita/opoo7kl/80416715886.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/iayWuig/aai_movie_video_songs_hd.pdfIn PDF document text
    • http://sodalabs.club/23025902716wy1wp.pdfIn PDF document text
    • http://specrazreshenie.com/passassured_top_300_drugs_quizletmdzf1.pdfIn PDF document text
    • http://onesmall.space/gonoluxipipoxotononfke84.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/giihWih/absorption_spectrum_of_chlorophyll_graph.pdfIn PDF document text
    • http://italywow.pro/radamufagazextmu9z.pdfIn PDF document text
    • http://pagixuzipalopa.iblogger.org/8613292452.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/zQij3ii/eclipse_free_for_ubuntu_16._04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girifej.epizy.com/99072971339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505a9558-a708-4909-9257-992bb977d0e7/how_much_does_it_cost_to_install_a_rheem_tankless_water_heater.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_77628e6f123447fea70aad696426e2c4.pdf?index=trueIn PDF document text
    • http://gedatedemokuju.epizy.com/79110972079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762db0d8-a1ad-4e84-9396-426dd0f56c0b/what_is_the_us_death_toll_from_covid-19_today.pdfIn PDF document text
    • http://kusamofezuz.rf.gd/nusuwewuropuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756a2649-98d8-486c-95d4-8f9a077de937/pictures_of_john_denver_and_his_wife_annie.pdfIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_3b4ea236e18f406b8c1385c62a22f64c.pdf?index=trueIn PDF document text
    • http://rudupunijosapiw.rf.gd/dax_function_in_power_bi.pdfIn PDF document text
    • http://koraxirimaxodet.epizy.com/teamviewer_mac_os.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f08bfb6-a238-4b63-b355-a345cf68cbb7/9296924777.pdfIn PDF document text
    • http://xekivis.rf.gd/nlt_illustrated_study_bible.pdfIn PDF document text
    • http://bajofot.epizy.com/58268054938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e58378-2ef7-4ac3-8f4d-4e299809dcd5/dell_e7450_price_in_nepal.pdfIn PDF document text
    • http://sawozepanoludib.rf.gd/89860378488.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_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 5376 bytes
SHA-256: 41e2c8d2ac5cf3f947eaf68b309c1158d9b3b6dfb5d88363f0e0cffff51cc757
font_01_sfnt_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 10112 bytes
SHA-256: 79c82347ebd29d75c7fb19a02c134718cf9555fce0b2cb5e40f7ecbc15f4be14

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