Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c4432458b03b82…

MALICIOUS

PDF

97.8 KB Created: 2021-03-11 04:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 6add38173403a62309b9218113da2b8f SHA-1: b8b1f2ba9bab01e22e47c9415ccefde344b2f1d1 SHA-256: e7c4432458b03b82a162c7bdf2956199d1a541b7f3cba4509c9e420680c83485
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a potential lure related to a book title. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting a spam or phishing campaign. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=capitalism+and+schizophrenia+anti+oedipus+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369777/normal_5ff675cba4f00.pdfIn PDF document text
    • http://keepxufi.space/history_books_in_urdu_download230e6.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/wamusi.pdfIn PDF document text
    • http://songkfrk.site/cours_arduino_francais65vu5.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/procreate_app_for_android_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425506/normal_5ffcd4ec77e89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463009/normal_603b3b1cadd5d.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/tcs_aptitude_test_paper.pdfIn PDF document text
    • http://pristav.pro/free_games_dx_ball_5frlsg.pdfIn PDF document text
    • http://harkateine.fun/48598567791n8hx8.pdfIn PDF document text
    • http://manovina.mypressonline.com/hampton_bay_ceiling_fan_not_spinning_fast.pdfIn PDF document text
    • http://momsmall.space/carvel_ice_cream_cake_shoprite4cp9z.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/bucket_filler_activities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_602a26429289e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenares.myartsonline.com/fosuxuwikuruterizis.pdfIn PDF document text
    • http://rofuvawitarul.atwebpages.com/holy_blood_holy_grail_audiobook.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_3986b42455954e23a88fb705fb2ee017.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03e2d58-19a9-42c4-ab08-13aab8239415/2014_lexus_rx_350_hybrid_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee7744c-38be-4aea-970a-3e81b82d63df/how_do_i_test_my_ez_go_battery_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0806c2d-316c-411c-950c-0e35fc0af39f/kolixogixemisorizuligawag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddf1169-328c-4791-8e41-25e880dfe1e3/8552931021.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/stihl_fs_85_pro_carburetor_adjustment.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_5f9fa4084af84e918b3590a65201e8b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a1a474-cedc-47fe-ae7d-739c5481aa85/35954203435.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_off000143a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A1 5352 bytes
SHA-256: af90aa495ee899fe4bcd48be7cdb80963aef4b1e465eb525105a4058dd50c558
font_01_sfnt_off000155a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155A9 10404 bytes
SHA-256: ba329c3090f2aeb4502606555957b24e1702c3f4db082ce62339b75299399785

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