Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1800d7ce4d9e2e…

MALICIOUS

PDF

79.2 KB Created: 2021-05-19 08:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a72f76e43181f4c4242cded709bcd56e SHA-1: 558dadb091859c2ae896f9de25366a23c9099d54 SHA-256: 1d1800d7ce4d9e2e2db994f7b56f4168a8628bdc854bdf13054227083869cdd3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://jottigo.ru/strik?utm_term=deer+hunter+reloaded+cheats PDF link annotation
    • https://tozowibalap.weebly.com/uploads/1/3/4/3/134383498/pejepifunemalab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_6040c0c92ac13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_606dd75762dd0.pdfIn PDF document text
    • https://jetebudatupa.weebly.com/uploads/1/3/4/7/134748577/wenukod.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/japetenojivi-mumuxig.pdfIn PDF document text
    • https://likudone.weebly.com/uploads/1/3/4/6/134681098/a4f41c86e6ec0.pdfIn PDF document text
    • https://danivuvi.weebly.com/uploads/1/3/1/4/131407625/xelibegojunun.pdfIn PDF document text
    • https://biwamuneluzotip.weebly.com/uploads/1/3/2/6/132696598/meninatenorabak.pdfIn PDF document text
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/26a97a07a.pdfIn PDF document text
    • https://raxabebawozovi.weebly.com/uploads/1/3/4/3/134311701/4800706.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/jojitagifuva/bach_lute_suite_in_e_major_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248bbe97-5324-444b-bdbc-b7a032406e3a/will_there_be_another_the_5th_wave_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/respironics_remstar_m_series_cpap_humidifier_and_smart_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf486279-f3fb-452c-ae1a-a7acb37d2a16/how_to_count_one_to_hundred_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/47296825227.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/zirupaxonirameduvu.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/62034237642.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/vakajinumefado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da13f05c-7f8f-4231-a115-155679349451/85686950288.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/docker_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/tunidizonuxefakew.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/congruent_triangles_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/jejuwugukimuk.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_off0000f9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 5024 bytes
SHA-256: d3577848c7436910e6a3045bc5c72896bc437bd7aaf38dbf5dd9ea24dea4a86e
font_01_sfnt_off00010afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 10608 bytes
SHA-256: 6f69c1659a392f512d580be7798f1644eee84a320fee8c2d3852e0d9d280ff97

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