Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2ae7c73a95b639…

MALICIOUS

PDF

87.2 KB Created: 2021-03-06 19:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9949a57771b68f0f43471a0f239557f8 SHA-1: 1ed07e8660d8ac56a428ba848bf3694b8b64f3a6 SHA-256: cc2ae7c73a95b639b66ea60e39f4d65681d5ee4304f2de217ad2331341c656d5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to other PDFs, suggesting a link farm for SEO manipulation or malware distribution. The presence of a malformed stream and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. The primary URL, https://maypoin.ru/strik, is likely used to serve a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://maypoin.ru/strik?utm_term=project+management+101+training+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392207/normal_602ab12cc433d.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/U4arG82/lakupodapuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367621/normal_6002ad69b9fb8.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/31557769108.pdfIn PDF document text
    • https://cdn.sqhk.co/mojesoje/ogEiejd/homonyms_worksheets_for_5th_grade_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fd61bc8f00e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450147/normal_6001ca2a1f4c4.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/divergent_book_series.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/hcgfVV2/lexijupetedodabipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_602a388f6b0ae.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/jajbypC/diaphysis_vs_epiphysis.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/jidagafinuxesu/guided_reading_lesson_plans_year_3.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/41251807847.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/bajirao_mastani_full_movie_480p_worldfree4u.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/18832112641.pdfIn PDF document text
    • http://dozopedatofol.atwebpages.com/how_to_use_a_mantis_tiller.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/tikurakipojazosilozut.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/emporia_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/united_technologies_annual_report_2015.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_4e611a6eb7e845c1b538220a54e6ea1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavalukato/dudofabimetogata.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/what_can_you_do_if_judge_is_biased.pdfIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_08d99db302644bbd905abd7046c3f4b8.pdf?index=trueIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_e7bc8c2b10754a2d93ade637becf3979.pdf?index=trueIn 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_off000117e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E1 5536 bytes
SHA-256: 9bb4e6f18021998b8107648c1e1f6858d942c84cb63b03a6f9897c3469bbadd3
font_01_sfnt_off00012aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA8 10840 bytes
SHA-256: 7798fdffefbf885f1b7c18f9bb6abe6276f85db078cf69229d6d94aef544d3f1

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