Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff104432c3c573a6…

MALICIOUS

PDF

87.1 KB Created: 2021-04-16 21:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 11fe0f54daa2e3a5af1fc25b2608d28b SHA-1: 97623eacd89eb3296412e2d89230b21e45143836 SHA-256: ff104432c3c573a6af77b815484c44bf836ac56fb37a14846c0103fe42e1cdb6
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 0.9997

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=manual+garmin+forerunner+405cx+portugues PDF link annotation
    • http://sagunasifug.iblogger.org/jokewusab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401994/normal_5fe6f380f0d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_605fea158ec12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_600490768d592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_606b6ced5d49d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_36b4468b0aff43fdbc0923ca0da83108.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75466367-016b-4d23-82c5-538212462ece/patterns_for_college_writing_14th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba9839c-5491-4987-8a49-9c392b484f75/65598538783.pdfIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_23be1d14c17c4670893cb93a15dbfbed.pdf?index=trueIn PDF document text
    • http://sedisukaviz.rf.gd/fozaduriwedumobuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6352cd6-37ed-4ae1-8024-2487f0113651/87049621584.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/les_miserables_review_sondheim.pdfIn PDF document text
    • http://wigeriwo.rf.gd/55000660874.pdfIn PDF document text
    • http://ripogulakurido.epizy.com/avoir_confiance_en_soi_marie_haddou.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/5867837084.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_a40255ac04664782a54a872631bab2f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajuse/eurydice_jean_anouilh.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_aa30f1a9a1f1483fb841e671bd6bc1cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b59471-8b89-43d8-a5cb-b46c474efc86/maxobufow.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_3c35ee65df604438943674b375c56971.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/dutch_oven_cooking_for_two.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_off00011546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11546 5760 bytes
SHA-256: 27242c64784119887bc4136d304341b17186875eefe59c1f85ec286482dc0a20
font_01_sfnt_off000128f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F1 11176 bytes
SHA-256: eed0f4438459cacc9e9c37e6d03dcd91db372ba92317a12296bc197172d43aa9

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