Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b19c2e80a37c17…

MALICIOUS

PDF

87.9 KB Created: 2021-05-11 10:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8de7cf4d49c617fb90f0e21227cc2242 SHA-1: 9c6caef0f11bd1b9063e4795d7056599ba24b513 SHA-256: 55b19c2e80a37c1723e6a17c9a5bee8f394629c5be1b244268d283a473af6c64
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 0.9995

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://lozipotod.ru/strik?utm_term=las+medias+de+los+flamencos+horacio+quiroga+cuento PDF link annotation
    • http://remontlegko.info/breeam_uk_new_construction_2018_technical_manualn6sbx.pdfIn PDF document text
    • http://topshops.website/26124879445j1q0q.pdfIn PDF document text
    • http://paypallsecurity.com/tatixafezujevadq1kgv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463009/normal_5fc8a57710f1d.pdfIn PDF document text
    • http://noverst.xyz/133914716629zs7s.pdfIn PDF document text
    • http://dorightunion.com/simmers_dho_health_science6pdim.pdfIn PDF document text
    • http://worldhold.online/mazigonumitogobp7krx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_5fe60dd58e36b.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_601afe4392971.pdfIn PDF document text
    • http://randname.ru/how_hard_is_navy_seal_hell_weekcw6yl.pdfIn PDF document text
    • http://youtube-subscribes.com/42335032816quy8y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385634/normal_5fc979759f9d3.pdfIn PDF document text
    • http://merovew.xyz/bonk_io_hacks_downloadzq5zd.pdfIn PDF document text
    • http://prodit.space/8433104826syd1y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418970/normal_5ff1afe9b7997.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/1cc1b4d4-9647-4ac6-976f-789d42b2c05c/98211814831.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/how_do_i_adjust_the_water_temperature_on_my_lg_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa64676-7d92-485a-883a-39dc028e008b/45963786161.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/what_is_an_english_literature_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/malilopixevoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/5949339259.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_off0001171f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171F 5500 bytes
SHA-256: 79b397f0e0e7fd3ae59285acd2536214a567a070b5ab38f9143fac7539fbfb21
font_01_sfnt_off000129a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 11728 bytes
SHA-256: 7e3ba80506aa16e662725b995c86486f021a78f36c8b58890e65dfc12d89066b

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