Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f16a0b2f3f380d…

MALICIOUS

PDF

75.2 KB Created: 2021-04-03 13:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a5efdcee938782535c5b2ef6b2e27444 SHA-1: 604f4e27992c9b82d24fae3e5413c3a3cf15d8f7 SHA-256: 54f16a0b2f3f380d3b739e06118ffbcf83458926c3a48d4afe90ddaa9b7489e9
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, with one specifically targeting a keyword related to a student visa application, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous disposable and potentially malicious domains further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/award?keyword=cover+letter+for+student+visa+application+germany+pdf PDF link annotation
    • https://fanejutasoja.weebly.com/uploads/1/3/5/3/135399707/xagupa.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/raperufub.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/libro_alter_ego_1.pdfIn PDF document text
    • http://bomisedoxu.mywebcommunity.org/nusunanatejeguneraginu.pdfIn PDF document text
    • http://bijipejip.iblogger.org/master_the_art_of_french_cooking.pdfIn PDF document text
    • http://instapodarok365.site/shakespeare_macbeth_plotq4dka.pdfIn PDF document text
    • http://hamsterbig.com/wellness_wheel_quiztlnzv.pdfIn PDF document text
    • http://siondez.ru/33404756428za81u.pdfIn PDF document text
    • https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/jelilajenuxok-dagujajonoroxor.pdfIn PDF document text
    • http://jumbochecker.com/adobe_premiere_pro_cc_2017_download_softonic8bbj9.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/regasex.pdfIn PDF document text
    • https://zalajugimawif.weebly.com/uploads/1/3/0/7/130739284/3261887.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/1abb95a3c.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/8aedb.pdfIn PDF document text
    • http://bewujasixi.mywebcommunity.org/chili_s_restaurant_menu.pdfIn PDF document text
    • https://gopikuximodel.weebly.com/uploads/1/3/1/3/131384340/karefo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugoxesoteko.myartsonline.com/koditalobefe.pdfIn PDF document text
    • http://bomevejoxofo.rf.gd/86369030888.pdfIn PDF document text
    • http://memaxomumeto.epizy.com/bartolinitis_aguda_tratamiento.pdfIn PDF document text
    • http://tanebani.epizy.com/65842226227.pdfIn PDF document text
    • http://kavejanunar.epizy.com/why_my_lenovo_laptop_is_not_charging.pdfIn PDF document text
    • http://wenumuno.rf.gd/pinakumakixilavajuju.pdfIn PDF document text
    • http://vorasatijede.rf.gd/67731176332.pdfIn PDF document text
    • http://tabomojepudidu.epizy.com/webex_room_55_admin_guide.pdfIn PDF document text
    • http://xuvafinuvewabek.epizy.com/1625762770.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_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 5540 bytes
SHA-256: e24dc960a084bed04a1e6730cd0c8dcc8293749eb6f411d37608de55de0a49d1
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 9892 bytes
SHA-256: 72aac46001e79e16ba170dd7e3293830e75962f6c06fa97b12e12355a01a7796

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