Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b0824e94f8db17…

MALICIOUS

PDF

74.4 KB Created: 2021-04-04 03:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 52598ebe28313547e4b8f2f3db5b411a SHA-1: 1c2ac478fadf81fbfd510fc65bb2aa0899500a4b SHA-256: c3b0824e94f8db17f150ba3e9cca4fa26589991e2829a5ad9aa14e3f45cb67ef
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, including one to 'lozipotod.ru', which is flagged as a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/wix?keyword=predicting+products+of+chemical+reactions+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417216/normal_601627b339ef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_6027c8ead26f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_603697847cc50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393486/normal_60289503dc91b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_5fd8df044bf7e.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/e11f84a9-876c-44be-bfac-c792428b8a47/how_many_calories_in_a_baconator_with_no_bun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c344007-3900-4c25-8dfc-343be137f822/9831303342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0422505c-9aad-4501-bca3-86f272479038/89381384905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351522cf-6c15-4495-b0b7-b1e98368eaf3/97911019115.pdfIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_2f33a20068e843a7958565b98de99423.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/932affb1-23f9-4da5-b4a1-17ba0f450de7/potedukerozafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45891387-f58d-4116-bb24-42e10d247dfa/jujavuwotugeb.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_18c79aa14ae74aee94f3f6ffe07a685d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/118c8874-d902-42dc-bd92-22710116f88a/nikon_camera_coolpix_p520_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade42924-ad88-434f-95f6-30f4d5a68838/diablo_3_ros_ps3_save_editor_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda032b3-eaab-4fa8-a4a0-5a07f9022130/peganebifekobokunexodowez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20e98b5c-2b6d-45f9-9417-27ef32b16b84/17641111915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4bb33e4-da4f-45dc-900c-245a09dae6b2/what_is_the_message_of_the_nightingale_and_the_rose.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_75c230f02e2d4a7cb9ce39ca4f0bfef5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd85814-376a-485a-b861-ba073127d917/mevikakuwixomip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f842a33f-3502-475d-ae9a-94fac0e4630b/zofogajin.pdfIn PDF document text
    • https://6bda1257-ae7a-4fac-840f-d5dfc178f195.filesusr.com/ugd/f4de5e_cc1858789eaf4fd5959b7cc67e3bfa9f.pdf?index=trueIn PDF document text
    • https://ff87c8b5-ca28-4ac0-94ba-218234037d87.filesusr.com/ugd/1d4e4f_dbbee290666b482ab20fd7d4e2efd706.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/089364a1-7156-4bf1-9f59-50e966b8a07e/basafusamefabijete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a423cab5-b62a-4d5d-a56f-d84b3bf85b64/digozozolabaxigugug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4b0c85-a0bc-4490-aaa3-f24c2ccef484/how_to_get_a_new_birth_certificate_after_adoption_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d11aff-2eea-43b5-94a9-a8b99d17d71b/vonudulejuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151eb593-b83e-4353-a93f-d2afce4d09c1/easy_piano_sheet_music_for_popular_songs.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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 5724 bytes
SHA-256: 6fb8f5f4438449c593ecbcccef3b7ff71af7add741c5a2b5628dc261393641f7
font_01_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 11196 bytes
SHA-256: 56a5b8de666d0b409b363342ad4cd72f6989e8fcda7fe76d1cc9d81e047ad7fb

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