Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabcbf6d3362ee9a…

MALICIOUS

PDF

92.7 KB Created: 2021-04-22 17:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e80b2fccbaebe7e138b6de323635eea1 SHA-1: 2880c33dc4e738cf7cf247f1dfd6c993b1ee7bf9 SHA-256: fabcbf6d3362ee9a150d235f35b5a674395994f13b6f137cb6955fc333248236
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference a product name, suggesting a lure. The presence of numerous links to disposable hosting and the ML classifier's high confidence score indicate a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=tc+electronic+flashback+triple+delay+guitar+effects+pedal In PDF document text
    • http://xuzobinemipivor.mygamesonline.org/practical_techniques_of_astral_projection.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/26605288413.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/macmillan_gateway_b1_teachers_bookqyh43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419423/normal_5fe4e16189c1d.pdfIn PDF document text
    • http://zedukibawubige.22web.org/the_beatles_bass_tabs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415327/normal_6000198ab7818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470826/normal_5ff3255fabe5d.pdfIn PDF document text
    • http://mattelipsticks.site/99527703012xgz1j.pdfIn PDF document text
    • http://snegny.com/how_to_do_3_to_1_ratio_in_cupsu8u9p.pdfIn PDF document text
    • http://kunewalijaxuna.getenjoyment.net/the_great_adventure_catholic_bible.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/all_catholic_prayers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_604d63080ced0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388813/normal_6005c845d53e6.pdfIn PDF document text
    • http://poxexududojal.66ghz.com/comma_splice_grammar_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lowevuribif.epizy.com/aramco_ipo.pdfIn PDF document text
    • http://vumijasi.epizy.com/boss_me_25_driver_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050dfb4a-26f5-481b-912b-c6963aba4735/miwosakapigulubimeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0173c8d4-657e-41ad-8788-517287b4f043/28963695745.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/toro_518_ze_snowblower_wont_start.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/gegenijonowetaliwufofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e761a05-f30b-4430-a62b-3c2a4d85fc32/88150852161.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/77096368548.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_off00012ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB0 5672 bytes
SHA-256: 1c1b2cb83cd0f0ef97e32e53324a9c60fb0ec60c69304c1d32ea559bc37765fe
font_01_sfnt_off00013df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF8 11532 bytes
SHA-256: 41602d6975f5edc8d4cde7f141b3616215586235d55fb86e46ab0613a3cfe74a

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