Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9ed5efce9774aa…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 23:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 72dd35323970374308807598b3464708 SHA-1: b96466a2d2bdbc97a173d06171b1abd63c34f611 SHA-256: dd9ed5efce9774aa7509d58abb812388938d112cf3dbaa23155a49bc24adcdd6
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 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

  • 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://ponafet.ru/strik?utm_term=o%2527charley%2527s+chicken+strips+calories PDF link annotation
    • https://cdn.sqhk.co/dofulokune/jjgehdh/cymera_app_apk_free.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/96856005537vu1ck.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/cgdIgiL/lego_legacy_heroes_unboxed_characters_list.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/jhAgihf/barber_3d_audio_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/dihy8Z5/regolalova.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/jucPfid/newegg_pc_builder_job.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/jnhiRji/48136887145.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/AUifqNQ/mod_installer_minecraft_1._14.pdfIn PDF document text
    • http://zumbayuliya.online/gusigemejafuduitro.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/gloiaic/69308393663.pdfIn PDF document text
    • http://websecurer.tech/pisaruzojamirobudalsdrfe.pdfIn PDF document text
    • http://a-trvl.ru/998239688876ab8i.pdfIn PDF document text
    • http://itgermany.net/beats_studio_3_noise_cancelling_vs_bosecjyjz.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/58ca954b-b5f9-4d51-ad14-b7329ba6beb3/dante_paradiso_canto_15.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f30697-f8d6-4d86-9ecc-27bce8fd3adb/ruvureserawisevowezor.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/96470910314.pdfIn PDF document text
    • https://1ae094b9-110d-4377-a83c-911b29edd90d.filesusr.com/ugd/d5eada_123a077331bb4d93a9851166ee2f782d.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_2cebf8cde32a4afb908d87bbf3336293.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e96cff4-f1e0-4873-8a5c-216f59cc966e/dosapunagawifu.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/dozejeniwosekuwa.pdfIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_41d07f49d19d442ea147a8011a8c55cd.pdf?index=trueIn 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 4

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_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 5248 bytes
SHA-256: 664829f7b0d61220b6631e33102dcf5fef809b42b8e6a0379caa869da8d1e9f8
font_01_sfnt_off000101e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E3 11036 bytes
SHA-256: 219966cc6a4723ca1fb8fcad53c6be5bdde0f33236de852a75269c371d05f449

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