Malicious PDF — malware analysis report

Static analysis result for SHA-256 3532a3197bc51af1…

MALICIOUS

PDF

84.9 KB Created: 2020-12-25 03:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ae8ff2fcb678b5e2516c3bd3cf9ed820 SHA-1: 9d9ced89273159a73e197072fab010d44ff6d863 SHA-256: 3532a3197bc51af1712ed2d7411fc20064ee0e6ced23cd866f8ddb4b4868b4f4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=iphone+6+plus+diagrama PDF link annotation
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/momasewoxiruxaj.pdfIn PDF document text
    • https://wovuxitijijigot.weebly.com/uploads/1/3/4/5/134524902/2983798f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5fc184844aa43.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/kieg1ji/vunikoseteratali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8b25525bcc1.pdfIn PDF document text
    • https://kimuximufa.weebly.com/uploads/1/3/4/1/134132687/tedarep_pewipotubenaf_jujibajexat.pdfIn PDF document text
    • https://cdn.sqhk.co/varaxupumami/hjbgcrh/vega_tools_llc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fd5fdc74f90c.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/duxujapif_jumepolifi_luzilarumezo_zomiduxevow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fbd9585db592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fbc021134266.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/1733051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/50016739325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903385d3-c7ff-432b-ac1c-99dc23be4ada/solar_system_song_lyrics_for_preschoolers.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/fesibutodibatovezibu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 3424 bytes
SHA-256: 453f786162c86eed280930e777455c3786e8516b39385a82cda234852d018387
font_01_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 5464 bytes
SHA-256: d2131aabc1a734b59fde49e550a8c4e7cc8b474253e72b3b4a748d57fd7688ed
font_02_sfnt_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 12968 bytes
SHA-256: 221dad19bbde9ac7e851a6de4e5d1582793aa524c73e6311903f1841003908ae
font_03_sfnt_off00012f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F31 16684 bytes
SHA-256: 4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0

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