Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40706e635e2a9d6…

MALICIOUS

PDF

78.6 KB Created: 2021-03-17 17:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82d35e0fefb5cda059206f33b3d8683e SHA-1: 6f432e237c4cc8bb00c0f78eee0e895f7d424778 SHA-256: c40706e635e2a9d6423d222fed3c1d81476072e958305b49252131d164ad53ae
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 0.9987

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://bologen.ru/strik?utm_term=magic+mouse+2+ipad+pro+13.3.1 PDF link annotation
    • http://sitizinudex.getenjoyment.net/3619018001.pdfIn PDF document text
    • http://tersq.space/contrato_de_alquiler_de_vivienda_simple_wordiam1z.pdfIn PDF document text
    • http://legalvictory.group/how_to_join_army_medical_corpsf05bq.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/kujog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_60033c5b7c5c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_600d1d94a6cab.pdfIn PDF document text
    • http://setifol.66ghz.com/30241242301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_603fe5325a398.pdfIn PDF document text
    • http://shoplus.info/19304338821u93ut.pdfIn PDF document text
    • http://waystep.site/39010059280ywqhv.pdfIn PDF document text
    • http://bestplacefor.rest/35122751743aqgtp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_601175cfb678c.pdfIn PDF document text
    • http://poruzotosiku.getenjoyment.net/51578796378.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02448dd-db63-41b5-808e-bab046cf2b1d/jejipuruboroteguxoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c6a9d78-6387-44b6-bf8b-45b6d1b0ceb9/sekure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e808ddf-ea37-4200-bca3-8a9e1858c3c8/what_kind_of_salt_do_i_use_in_my_kinetico_water_softener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb57107-d2e2-4546-ad79-d8cb406672d4/75898590704.pdfIn PDF document text
    • http://dedalumakur.epizy.com/what_is_medical_microbiology_class.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca8a778-1678-41af-a08f-1eb74bafd8fd/misofukegifusojalif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2706c680-96ec-43a9-954b-eb04411d1aeb/the_iliad_fagles_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4073b46e-91df-4d02-82e4-715822bdda01/zanenob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381049f8-7096-4db2-920d-6dbc41beffdd/54463207243.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://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_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 5748 bytes
SHA-256: 0fb3531d4e805c827ee6906cd834dc81a23e4a269f7e183487915839c6ca340e
font_01_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 11228 bytes
SHA-256: 5bc5da7373ddeae8becc44eec90be13ec1dc8ffd9d4fb7cc039dd50a4115b15f

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