Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf1b903727de514…

MALICIOUS

PDF

77.3 KB Created: 2020-12-16 07:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9b53bebda01e47f7368f73ae464afe00 SHA-1: 02438c39dc9ae3b7a768c4c9908341d08d6be61b SHA-256: ebf1b903727de51448bbdb4694aa20339a42702a3c828c5e905d8a683eecb15f
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML classifier score for maliciousness. The embedded URL 'https://traffset.ru/123?utm_term=think+like+a+billionaire+scot+anderson+pdf' is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the overall structure and URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://traffset.ru/123?utm_term=think+like+a+billionaire+scot+anderson+pdf PDF link annotation
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/6439391.pdfIn PDF document text
    • https://letalisukom.weebly.com/uploads/1/3/4/3/134316231/nosepepano_leboxo_liseraba.pdfIn PDF document text
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/7840246.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/jijujakasuzido_sobudasadej_xirimezefu.pdfIn PDF document text
    • https://towajusuw.weebly.com/uploads/1/3/4/5/134521237/8f5977f1fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8a5c1eb0a44.pdfIn PDF document text
    • https://mesaxejako.weebly.com/uploads/1/3/4/0/134097573/52f72d7d49c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8ef60e47-bf48-42dd-b75a-cce7fed494e0/rubanebonipelireripes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7830239503a47f6fdd30c/t/5fd7417296ed101a3e5c179f/1607942515679/sputum_culture_and_sensitivity_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5608abe9b69395128be43/t/5fcd88131e1a4d7de14325f8/1607305235852/angry_birds_friends_download_for_pc_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba33293-74f0-4ecd-b1ec-eb6f9301fe05/worukipavesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e567b3-6219-4f2b-ac22-35e54b7fab82/bowamigilaridonagisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1adf213-7d1d-41fe-bc9e-ef63f1ecc3a7/98728009137.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdefbf56a976706ec3f3b3/t/5fd5f300226e9048faab50e6/1607856897648/backup_android_apps_to_external_sd_card.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50966f7cf8c7540456227/t/5fc6ae333f75b16643c14409/1606856243695/wedunori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ca3446-b142-449a-97d6-6e33744d52a6/85612068557.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 5184 bytes
SHA-256: 79de859c1ec6b0a1a8b5ed17492470ad5d8cc63304e4235ac1bf7c69a91ce98c
font_01_sfnt_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 10496 bytes
SHA-256: 9ad339a05f16c4a5d21fd45dcc9d626e2f96c8f6558ac6cfab5cafe66a44c649
font_02_sfnt_off000119b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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