Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1458013928aa77…

MALICIOUS

PDF

55.0 KB Created: 2020-11-08 15:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 30be9d23d35508e1b1448906959cd3ad SHA-1: 53465d6336d0fe748d3e3786d0a508fde7c8ed95 SHA-256: 2e1458013928aa770a5506c5a3e92cd2e0458aa7190298664c20deb4a534a86b
124 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 an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?keyword=kansas+medicaid+application+pdf PDF link annotation
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/nipota_fawor_xisitusuwijo_duvutijetisa.pdfIn PDF document text
    • https://mumetepelexax.weebly.com/uploads/1/3/4/4/134461787/degixixe.pdfIn PDF document text
    • https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/8899957.pdfIn PDF document text
    • https://didizotaxudip.weebly.com/uploads/1/3/4/6/134619455/3fd5657.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/vexosafugunu/natures_menu_dog_food.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/ratawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6689e63-05c2-4729-a60e-e71bb27f1db9/78578266268.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/15839903162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fded702-0c31-4ce5-855a-dd0372db9022/pathfinder_cleric_class_guide.pdfIn PDF document text
    • https://vobibavimiz.files.wordpress.com/2020/11/dukizun.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/cancionero_de_rock_para_guitarra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04886069-ef77-494a-89fb-7a20ff72d297/tolejugunomolevitigivu.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
    • https://jixiluzab.files.wordpress.com/2020/11/43724511552.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9882 5176 bytes
SHA-256: a12dede41a6f88cb88748ad062a61fece5f0a661453e13292652a1b265f2b16d
font_01_sfnt_off0000aa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA18 10960 bytes
SHA-256: dc65090688dabcda221155ac9ca774ba9b3a69ec4a62926c0b28ede57609cae0

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