Malicious PDF — malware analysis report

Static analysis result for SHA-256 d459b8580d3f573c…

MALICIOUS

PDF

102.2 KB Created: 2021-03-02 03:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 42dd406d050076d871fb16bf20d9c5a3 SHA-1: 1994c43f7f0786ce72648006c02ad0744ef21fec SHA-256: d459b8580d3f573c8da21c99126ffffa42235975c8d442c9d6403c59eabecdb1
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lead users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

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://fokemale.ru/strik?utm_term=what+is+lucida+means+in+spanish PDF link annotation
    • https://vumamoxaku.weebly.com/uploads/1/3/1/3/131380777/4165904.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/36590706640ffws7.pdfIn PDF document text
    • http://erogan-columbia.site/sewelamujovezirafasigocx9q.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/18330502039.pdfIn PDF document text
    • https://dipapira.weebly.com/uploads/1/3/4/6/134610741/1308021.pdfIn PDF document text
    • http://allfreebets.ru/6438342578666sew.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/21322935657.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/application_form_for_girlfriend.pdfIn PDF document text
    • http://itdiscounts.pro/dorset_ontario_weather_report3dobn.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/download_twilight_saga_eclipse_in_hindi_filmyzilla.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/pigitomedebevub-zuzuwuxaw.pdfIn PDF document text
    • http://alexsaf.ru/25035199058idjnr.pdfIn PDF document text
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/supoluli.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/gijurubotazorejadu.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/sisowonu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/sitozi/broken_chords_piano_sheet_music.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/how_to_find_a_percentile_rank_from_a_z_score.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/verijasivalasaxidijulut.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/11220035694.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 5192 bytes
SHA-256: 075954d204ff85be68d354630bc506bbb24cf129c68c867e43d27d2684bc23f9
font_01_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 5232 bytes
SHA-256: 6516b7cfaf408f303c3bbb7088cc19869ff52d5e87f8fd6e4eeb8c033d754394
font_02_sfnt_off00011041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11041 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_03_sfnt_off00011b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B48 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_04_sfnt_off000125fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FE 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_05_sfnt_off00012fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC9 5848 bytes
SHA-256: d9428d9e8ae0b80c2686f7a083f2b0e6e3fcfba2111c305e65384b75baa1d4f2
font_06_sfnt_off00013e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7E 11868 bytes
SHA-256: a23d88312de5bb84cc412d0c5af102b9bf3bae1714bf911491ec093936c30b60
font_07_sfnt_off0001662c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1662C 16652 bytes
SHA-256: d3bfa78d65c1b01afd240749b9877c84464ec9c1b4f89db362fe99e44dae3ebf
font_08_sfnt_off00017d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D5C 2644 bytes
SHA-256: 489ea0736659e4227260fd19b240cb51b6c3b4de1413d48cb2d2b1b06316a79e

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