Malicious PDF — malware analysis report

Static analysis result for SHA-256 db83a3e08e2341fd…

MALICIOUS

PDF

121.6 KB Created: 2021-05-16 13:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 300d2a73e6714dee39751d4b2a86dc14 SHA-1: 5d57206d26f947cf4129c24b86f35e6dcb7e5c3e SHA-256: db83a3e08e2341fd5ab93340ef9ddfae2f0f7fffbe099647191222ddc08722c7
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 0.9998

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 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 http://getepitisux.mywebcommunity.org/75966622964.pdf In PDF document text
    • https://cdn.sqhk.co/tawunipufop/IxjbOhM/guide_for_zoom_cloud_meeting_app_download.pdfIn PDF document text
    • http://kewotij.mypressonline.com/56604881715.pdfIn PDF document text
    • http://momarivido.mypressonline.com/52038000014.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/how_to_wrap_gift_with_thin_ribbon.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/f8hf2gj/summer_fun_word_search_printable.pdfIn PDF document text
    • http://mukuwasoveta.sportsontheweb.net/lefop.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/duvivewov.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/76252615958.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/WboozbXZlIE/wb?keyword=green%20dolphin%20street%20book%201944PDF link annotation
    • http://badamowafe.onlinewebshop.net/37632327815.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/what_is_the_name_of_the_mountain_that_the_roman_gods_live_on.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_0465271b59904519a0aa45915f39c763.pdf?index=trueIn PDF document text
    • http://puvapulugo.onlinewebshop.net/dominos_vegan_pizza.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_eaa844d00f1b481c8b33b4f447ca7609.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/bombay_movie_720p.pdfIn PDF document text
    • https://ed457e25-7262-4bf7-b769-9a3df1da8a49.filesusr.com/ugd/60ac0c_9ccb959c84924702aa94b192426242c8.pdf?index=trueIn PDF document text
    • https://334e481f-4595-4613-8514-cf1b68b0f675.filesusr.com/ugd/a5bb32_59916cdf347343ebb578e62f12c379f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/261bf71a-a14b-4f73-9ba2-5607e5347668/75117732541.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/how_much_does_it_cost_to_get_a_cuckoo_clock_repair.pdfIn PDF document text
    • http://nofolimuri.myartsonline.com/lagetezomivesivafigofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc45cf6-2866-4a77-b199-b9b7f050b3e1/how_much_do_starbucks_baristas_make_per_hour.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_1f48c8a4d13d440c81d6e64ea000e0ce.pdf?index=trueIn 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_off0001a12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A12B 5368 bytes
SHA-256: 5e35a81d17ed82a061bd6653484d8541e24c21a6b174bd26b58678a72f6a2b43
font_01_sfnt_off0001b363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B363 11452 bytes
SHA-256: f97d03edcabab857203c283b4fb2bb2cf6725cfdfa592b58afbd20a3bf8ee252

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