Malicious PDF — malware analysis report

Static analysis result for SHA-256 456a3742a4ef9af3…

MALICIOUS

PDF

78.8 KB Created: 2021-03-23 04:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1cbb43b1b224108e48ae3111b934423b SHA-1: 73ace3d62612fcdc4752fd58dcd4ba5fab589f4f SHA-256: 456a3742a4ef9af395e7c88a66d0db6893a2b655b5d2994b61c23e40f90b30f4
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 0.9996

Heuristics 5

  • 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 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://vilenefex.ru/wix?keyword=plc+ladder+programming+examples+pdf PDF link annotation
    • http://strapslap.online/mufixikatujuvuehlxi.pdfIn PDF document text
    • http://jotijitod.66ghz.com/wilifolap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_603c7162b1330.pdfIn PDF document text
    • http://vertitribe.store/icmr_nutritional_requirementslftzx.pdfIn PDF document text
    • http://energierecrute-emplois.com/war_is_a_racket_full_textejd2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_6048c11b810a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_6059472acb038.pdfIn PDF document text
    • http://afracheat4.xyz/bose_321_series_1_remote_controlkc71k.pdfIn PDF document text
    • http://winoorama.space/all_souls_day_mass_schedule_20194quon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5ff2ff6424192.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455670/normal_6001c06c8e86c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ripavumijew.rf.gd/63977618584.pdfIn PDF document text
    • http://kasupitebuse.rf.gd/dowalalisemiwuvelokuze.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/dikekasarap.pdfIn PDF document text
    • https://a5f97fb6-6895-4a42-8c51-2de4018fe37d.filesusr.com/ugd/1eae48_46ea115673b847c38bcc36cb59f77b08.pdf?index=trueIn PDF document text
    • http://gaxodusipif.epizy.com/block_matrix_multiplication.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_c4c89e69f1bb431e92b7d525113a029a.pdf?index=trueIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_2bacbe0f57114dbd8fbc5f0616c263a8.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_fd17c8c7693a484d90fc99d890e8c2c0.pdf?index=trueIn PDF document text
    • http://valamujunitun.epizy.com/weather_report_carpinteria_ca.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/dekunujufisejeruxolazex.pdfIn PDF document text
    • http://wejowuwa.rf.gd/contract_of_employment_part_time_template_free.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

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_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 5544 bytes
SHA-256: ff6eca4d207243a821715a3c48bd1c43498bb55f15e4d821fe2c7ec10bde8633
font_01_sfnt_off0001090c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 10880 bytes
SHA-256: 90b4c19474f08b8ac046f4dc6e0dc69b6cddeba4d03efd3149d454acf3c3697e

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