Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a41e6191da9a2a…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 13:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b6e8b7e6a08b9079c127070892cf02f3 SHA-1: e72f394d1a31d8847ed3bbcb13787f742ce60e62 SHA-256: 14a41e6191da9a2a18f3c7bc6957a95288bf084fab55f551a0529c9839fa29d9
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 0.9994

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=blue+dapple+dachshund+for+sale PDF link annotation
    • https://cdn.sqhk.co/bogulevim/Njdjgcz/4649479625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fe3aa06636f1.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/fnPie8o/vajogoxusifonixuzolilojuv.pdfIn PDF document text
    • https://cdn.sqhk.co/zaletimerizo/jbeqDgc/kapodopapuw.pdfIn PDF document text
    • http://cooldomen.space/crochet_granny_square_afghan_kitasach.pdfIn PDF document text
    • http://salonop.xyz/interior_and_exterior_angles_of_a_triangle_worksheet_answersr5rx7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367960/normal_5fc61fe25baca.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/skin_toner_formulation.pdfIn PDF document text
    • http://vufiwopader.medianewsonline.com/asian_countries_flags.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_604d1926b3b20.pdfIn PDF document text
    • http://musofiron.ru/nenetiw3eb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5ff3d4c1263bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_604d1ae9e1b2c.pdfIn PDF document text
    • http://cuzinfo.ru/wopubomadegonidudrj3qe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482623/normal_6008d0e5291ad.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/nupugil.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/sugojumezofutezujenesowiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5ff136511ca49.pdfIn PDF document text
    • http://pressit.space/computer_hardware_and_networking_in_tamilm06d8.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/f4078c9a-dbb1-4c62-a324-2bdd15a710db/72131808939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d4c67e-eb08-4e5d-8ca2-d5d4bc46c3f6/wububizanerusidasemewirom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6439d436-baa8-4698-9158-eb36f875b218/268667185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a108e8-452f-4790-95cb-e3817fc0baa6/maytag_quiet_series_100_not_draining.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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 5292 bytes
SHA-256: 2de16c1dcadf2c5bd366ef33f211717c2171eb72de302d937557d82dd974b91c
font_01_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 11560 bytes
SHA-256: cd693b6da155163bd2ae2ef3dea81b8626d92f23aceecae779c72488157f17a9

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