Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d34cd3f0e9470da…

MALICIOUS

PDF

72.8 KB Created: 2021-03-21 08:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bf3283a7b9f6f6bfe1988655550f8441 SHA-1: ef7b08b95cfda9a9fd3f5b20ca154d9ce416e117 SHA-256: 4d34cd3f0e9470daeb7b0416abaed9e7c09d77c29d94579e642777613ba2a4c4
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to an 'Alejandro Aravena elemental book pdf', likely a pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=alejandro+aravena+elemental+book+pdf In PDF document text
    • http://tamodemuror.getenjoyment.net/18432224804.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/26700398827.pdfIn PDF document text
    • https://cdn.sqhk.co/wemojezuvegi/QDDJKie/lowirepogudusewaxiji.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/mBAjfiS/monkey_bread_muffins_canned_biscuits.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/e6ehfgh/retro_space_shooting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/ij6yheX/double_bed_sheet_and_quilt_set.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/pioneer_elite_television_speakers.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/hjiYwuQ/11843075586.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/kivigijureziwevak.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/how_much_money_do_nfl_players_make_if_they_win_the_super_bowl.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/3041833b-dbc2-4615-a6f0-788b41cf51a2/nonlinear_plot_structure_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/12223445503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee820649-79b6-4612-937b-8ea2b9f29265/retovuponi.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_b6848f6f432747d2b3b39d566d4f2743.pdf?index=trueIn PDF document text
    • http://feferabi.atwebpages.com/30442922628.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/aircraft_performance_book.pdfIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_d4869122ad2047399b9cefbbd9f7d37b.pdf?index=trueIn PDF document text
    • https://4ab51db4-2ab9-4ce7-8cf9-a7235cd4f8a6.filesusr.com/ugd/c6359c_f6dee0b2a0454a11a616fba404d85166.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/bloody_mary_movie.pdfIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_c280293bf0034f5dbf21d5bd611cd4f0.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_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 5336 bytes
SHA-256: 03a2bf900db6950f8eeb4dbe1eb44fcaf200b3d5356ff63cf14ea1b81265e1dc
font_01_sfnt_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 11388 bytes
SHA-256: 59955663eaff12eb9deeb7cdc0cd54414545fa17bd422480dedbb87e802cf7ca

Open this report in the interactive analyzer, or submit your own file for analysis.