Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a727cb4905ba66…

MALICIOUS

PDF

143.4 KB Created: 2021-05-06 03:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7862e2f3400976026e3b43f44a4110c3 SHA-1: 5f943cc28eb8209631651d29b61afeef9eb623a2 SHA-256: a4a727cb4905ba6623d26ae1f1140cdba581264769c03506c4c7b36045076bd0
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 0.9994

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/strik?utm_term=legal+latin+maxims+dictionary+pdf PDF link annotation
    • http://normal-id.com/cosco_pronto_high_back_booster_seat_22-491_fsm_featuresn20gq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5ff9364a882b4.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/bivariate_poisson_distribution.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423429/normal_6001833a0f128.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/tevaxatoxasaso.pdfIn PDF document text
    • http://podeves.xyz/bang_bang_movie_in_tamil_hdr23sx.pdfIn PDF document text
    • http://petrol-v-pol-price.site/bobcat_2200_service_repair_manualkmo98.pdfIn PDF document text
    • http://kukushpa.fun/partial_differential_equations_matlab_toolboxtkjn1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_5fe63650f005e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459645/normal_601f9aace4946.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_5fe2e46787305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_6041bcec59561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_5a3496c945794b9e8ed52c413a2511cf.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_bb90b16ece954743b513091007e8d6bc.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_67d881b0aca0418d895dd79ee8c911f0.pdf?index=trueIn PDF document text
    • http://kivozusemu.atwebpages.com/autocad_to_dwg_converter_free_download.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/business_productivity.pdfIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_3100fad34b7b4d7aa3e22a1e847545bc.pdf?index=trueIn PDF document text
    • http://xekazaz.myartsonline.com/sojobaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b83ae6-8c13-4b33-a589-e9f9714cee6e/les_trois_mousquetaires_film_1961_acteurs.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_87180547f5724fcca4a67d78f45a52f5.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC7F 5588 bytes
SHA-256: daed3d5a97612c560b8ed61696b9e7bf9c8b71e0b88c7b6b5fa5496266797de5
font_01_sfnt_off0001ff80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF80 14152 bytes
SHA-256: bac5522d58ffd93623b8e6a5f811f68158fbe18b18189092095a22f3a3df8f45

Open this report in the interactive analyzer, or submit your own file for analysis.