Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d6ae2a44af3720…

MALICIOUS

PDF

69.3 KB Created: 2021-03-18 05:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e03a58d16de59576d11fb0bc6f5bdef SHA-1: 55cc32475f6c78fffafb028ad7effdc60d304360 SHA-256: 19d6ae2a44af3720dad8d269002ca6e5bba12414972f1a93b56f8c1a0bff76c6
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 0.9998

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://resalured.ru/strik?utm_term=what+is+a+logical+expression PDF link annotation
    • https://derifopo.weebly.com/uploads/1/3/4/4/134490925/7165257.pdfIn PDF document text
    • https://tulopudegiwidal.weebly.com/uploads/1/3/0/7/130739196/rorugugotavoj.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/lego_architecture_studio_book.pdfIn PDF document text
    • https://sebidodeg.weebly.com/uploads/1/3/4/4/134438526/e6f8ff8d828211f.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/sejamadinazolulovidu.pdfIn PDF document text
    • http://zespodsvetkoy.site/rochut_melodious_etudes_for_trombone4gzty.pdfIn PDF document text
    • http://sushibara.net/feginazaxegigesiwudogorofgbl5d.pdfIn PDF document text
    • http://salestore.pro/69074973115vi3wu.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/f2184383-eed4-4226-b879-eb07ad689365/how_to_set_the_time_on_an_armitron_pro_sport_watch.pdfIn PDF document text
    • http://rokodejufoda.rf.gd/7187703884.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/answers_to_what_are_your_weaknesses_question.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/45191027193.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/american_girl_felicity_short_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29467b40-181c-45a5-acfe-4c562d57e3a8/nunefa.pdfIn PDF document text
    • http://pusevim.epizy.com/lexile_conversion_to_guided_reading_level.pdfIn PDF document text
    • http://sojurok.rf.gd/functional_organizational_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f32c27-96fe-42d2-896f-12cc7f719ece/13348108299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf090093-e47d-452d-9b8d-63a3cf23b33d/book_thief_summary_part_9.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/horror_movies_2019_mp4_free.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_off0000cef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF5 5276 bytes
SHA-256: 5f8f25655cf62436e9d59ce488ce832fe685351fdbd3ba7f5e3c645e2ed66e28
font_01_sfnt_off0000e0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F6 10952 bytes
SHA-256: 7251764eaaef2f712be52a643ed44708dc3264f88b10864370215c8dded42d9b

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