Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7eb92d0b39834e5…

MALICIOUS

PDF

101.0 KB Created: 2021-04-01 07:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ba0f214484ff4b2ee96a624d454cfe65 SHA-1: 506b0d58afa118662ba13a6f6c96aada27a14760 SHA-256: a7eb92d0b39834e57377150a8e26329b599df98bbbac77329044e099cbc12e30
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 0.9926

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://seumenha.ru/123?utm_term=avani+avittam+2018+mantras+in+tamil+pdf PDF link annotation
    • http://dazemuwemez.22web.org/36663676658.pdfIn PDF document text
    • http://azalea.store/how_can_i_know_my_zodiac_sign_by_date_of_birthko4su.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/9dihCr7/tiptop_esl_ltd_job_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472200/normal_5fd90b0cafad1.pdfIn PDF document text
    • http://mgacessoria.online/pixogezv17d0.pdfIn PDF document text
    • http://strahuemsya.info/2020_toyota_camry_xse_hybrid_for_saledlydg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_6058de37b3aee.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/hdghngf/42645033113.pdfIn PDF document text
    • http://sfr-espace.best/banipumatimabisvm7ee.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/3fja0GT/faperakuv.pdfIn PDF document text
    • http://damvglaz0.xyz/pagemakopusifuilyzr.pdfIn PDF document text
    • http://lumacy.site/29319995926i1u5d.pdfIn PDF document text
    • http://dommasters.site/axler_measure_theory_solutionsbpewe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368505/normal_5ffa408af1b35.pdfIn PDF document text
    • http://yourbigdick.space/78050139225zurck.pdfIn PDF document text
    • https://cdn.sqhk.co/tixaxelubigi/gdSCuhb/guidelines_in_spanish_meaning.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://fonimegalidoxu.epizy.com/xopomubagifoxabelitero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c162e7-8450-4b91-93aa-770fb764b520/70697370991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515f2403-aa1d-4830-9013-beac67e84c3c/kewejobidikevilufi.pdfIn PDF document text
    • http://dovitunazimaze.epizy.com/964113424.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012716.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12716 4004 bytes
SHA-256: cc5be186433e968b3cc3cd3cf81c1b4826f94504cb34c91baea9931eed4ba8fb
font_00_sfnt_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 5756 bytes
SHA-256: b0c845843554a8cdecef6d4eeda34b6309accb8fd218829f693b570adb3aefea
font_01_sfnt_off00010b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6A 3936 bytes
SHA-256: a3593e8a5cf28588d6267fc9cd422dd011e6131ec396f464389e92889043ace6
font_02_sfnt_off00011950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11950 3600 bytes
SHA-256: ae89dd74fde824e55118575d5db3afde25df2e6c1c7ae8a5734113f686033181
font_04_sfnt_off0001360a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360A 3720 bytes
SHA-256: 28dbd506f5d42d266b92008af22ec2f005d343dcacbf23fd5d8eaa2c5b141ba6
font_05_sfnt_off000144b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B7 12548 bytes
SHA-256: 15d6771366a84f4645c07734238c21f6a924bd2a77158891b010824aed76748d
font_06_sfnt_off00016b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B4F 2900 bytes
SHA-256: d2e65fafe0f923143dd558f989dee60d2ca2959bf3064f556a40f55427650f7d
font_07_sfnt_off0001770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1770B 3140 bytes
SHA-256: cdbaa58406ecb8737ceceef0914cc0f0d48d27c21fcf0083b81a96287d38a221

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