Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd015b82a8912919…

MALICIOUS

PDF

84.8 KB Created: 2021-04-05 13:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 931bc04f62ede6beabd1ca621c0880fe SHA-1: 418577c7e87b075eb782537ed1790578d648e9c2 SHA-256: cd015b82a89129191d8bb8d2e3d0c898f37c7a4fbbb780ae21a35d64d8f0d675
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to redirect users to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain search-related terms, suggesting a lure to trick users into clicking the malicious link.

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://maypoin.ru/strik?utm_term=lg+hbs+820+price+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376379/normal_600af240e2dc2.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/best_books_download_websites.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/simile_metaphor_personification_worksheets.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/shakespearean_language.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/what_are_sensory_receptors_for_taste.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/9addf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_6030aa1612425.pdfIn PDF document text
    • https://nobobigo.weebly.com/uploads/1/3/4/4/134403715/3799431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447095/normal_5fcaeba80d4b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_606a8d5b247aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_603a78b519dd7.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/2b24d889-14ca-4091-8106-5bfcb31ae796/it_is_called_the_age_of_reason_medieval_renaissance_baroque_classical.pdfIn PDF document text
    • http://pigutun.myartsonline.com/fagezekasefuwanurev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7602149f-8c70-4f0f-b231-ff3787e3ebb6/is_the_killing_available_on_netflix.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/72884021599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a0c0cb-719c-4bb1-a47d-d8e63858c44c/one_of_us_is_lying_series_book_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79eac625-637e-47cf-afc7-c06e78df6125/zefipogidajedupojaz.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/tagimolefozidabitizos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3977f48-af5f-4e67-8fb4-92313943ff38/radakusexumaregis.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 5852 bytes
SHA-256: bac656c8ae4f700e35c412a7629b9ebb677506c49fdb71dc1661ae5338f0d643
font_01_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 10804 bytes
SHA-256: a89cc153c7d4bf357e55dd1a0a75c4713b10f9839cafc745898ca60a2678262d
font_02_sfnt_off00012ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC3 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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