Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddbf90d88c3d3b1…

MALICIOUS

PDF

100.2 KB Created: 2021-04-18 20:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ed2e65e95e77286b08782e4f3b13aaed SHA-1: b6d81b0a8af931be45594b34fe62dada9aad1758 SHA-256: 3ddbf90d88c3d3b178b79736bde88fb36abecd8e006d4bf3c51a6e5e42f90bcd
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 0.9996

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://bologen.ru/strik?utm_term=krispy+kreme+donuts+nutrition+facts PDF link annotation
    • https://xowonijateroz.weebly.com/uploads/1/3/1/3/131380337/99deebf823be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_60181158b76ed.pdfIn PDF document text
    • http://dinudavap.iblogger.org/jerovosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460076/normal_6067d68bbf146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470035/normal_5ffddb87bf94d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446944/normal_60002041c1828.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/6964663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465250/normal_60049311b3ba2.pdfIn PDF document text
    • https://gezameluloxeg.weebly.com/uploads/1/3/5/3/135393377/2840784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_6024b7474ee54.pdfIn PDF document text
    • https://tuvaxijilitug.weebly.com/uploads/1/3/4/6/134668501/2574458.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/40236320849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_606af021d3bc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483075/normal_603373c07fc57.pdfIn PDF document text
    • https://jomupalekiloja.weebly.com/uploads/1/3/4/3/134310494/noxatulubi_judoduwupokode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375195/normal_5ff63611a9cce.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/51c4e123-c97a-414d-b2f9-3675be63cc7a/how_to_draw_eyes_in_simple_way.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d21d057-b595-473d-9d6a-51fe8e897a4c/50920594320.pdfIn PDF document text
    • http://memajale.epizy.com/arranging_fractions_worksheet_for_grade_3.pdfIn PDF document text
    • http://gibidapasajug.atwebpages.com/capacity_building.pdfIn PDF document text
    • http://vinegufoxa.rf.gd/17663572250.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_off00013bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF4 5284 bytes
SHA-256: 9ab39c2ea34ebbe72dd855c5b04b712d233f62891878c890bf1443f552c040d1
font_01_sfnt_off00014de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE2 11784 bytes
SHA-256: 787c54d2df10123182754ed95a5f844cb807a45459657e4970be2d80804cb988
font_02_sfnt_off00017557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17557 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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