Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf0bbb4da4008bd…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 09:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e78d16b2ee02c8c2b635761ee922ba3a SHA-1: bcda196cf6eb5b89db6aec9bdd544115b92cc1b8 SHA-256: 1bf0bbb4da4008bd6ce06b6921f67e98c981094d77fd938ae990bb1c05ab07cc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The embedded URL and the document's apparent purpose of mimicking a search result suggest an attempt to drive traffic to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=treasure+valley+livestock+auction+phone+number PDF link annotation
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/vurogunedeba.pdfIn PDF document text
    • https://fakodide.weebly.com/uploads/1/3/0/8/130874451/gavewelifem.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/gjOMfv1/79308400629.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/dilifepavazu_beminobino.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/logitech_create_keyboard_backlight_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/jiiPhdi/2822157299.pdfIn PDF document text
    • http://pewujok.mypressonline.com/89690655816.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/1673c846-3342-44ba-9930-9f52a4df15f5/64682209305.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/43867941218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645cf290-c74f-48f0-8cb0-8f83fa099096/3000_common_english_words_with_hindi_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67b1a78-6452-4cb1-a613-dad6fae4af8e/group_theory_by_sudesh_kumari_shah_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60ca293-3942-4e0d-afd0-6306523ee3a8/14732266718.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/73771001049.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/tijuderokemijajirugelejik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71975f67-b587-423c-8a36-78d6732650c5/70332820552.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/61303253661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687925bc-7189-4252-9409-9ee2cdda064b/a_night_to_remember_book_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a58fd5-cb44-4529-a002-9b6b1b3cb634/dewalt_dwe7480xa_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83f28d0-f743-482d-a16c-5274dad9de0e/laserjet_m1217nfw_mfp_user_manual.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_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 5488 bytes
SHA-256: aa515a47aace466c4433a7dd72ed99366bee0f9540e3e5702911a17769e3a89e
font_01_sfnt_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 9872 bytes
SHA-256: 47eea98c300542e0574d3a4e24adf8a54cab430c7293ad9cd2fb63f5ab618b75

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