Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe26139ee28c18a…

MALICIOUS

PDF

77.2 KB Created: 2021-04-21 10:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2ad98a4faee5a552e8c020304ded09d3 SHA-1: 24e4d09ac694709c8250131168701a593471a5d4 SHA-256: 9fe26139ee28c18a4b705a94b1b7a364a905990d2c6264fa0948df2c136429b6
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to product resets, suggesting a phishing or scam lure. The presence of numerous links on disposable hosting further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://yafferge.ru/strik?utm_term=vizio+e420i-a0+reset In PDF document text
    • http://online-bestshop.xyz/what_is_advanced_business_analyticsy6zea.pdfIn PDF document text
    • http://manybigs.space/hospital_under_ayushman_bharat_in_varanasi9w8aj.pdfIn PDF document text
    • http://lngcliente.com/xejutotejahhw74.pdfIn PDF document text
    • http://greyfruit.space/safotusibalilaboferazikiz4ko44.pdfIn PDF document text
    • http://liketsven.xyz/developing_mental_toughness_in_runningv7nm2.pdfIn PDF document text
    • http://vukorivita.iblogger.org/15159149215.pdfIn PDF document text
    • http://rinobozawizuvew.iblogger.org/56647858253.pdfIn PDF document text
    • http://zeropium.com/the_winter_of_my_discontent_quotew9h8p.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/bjgK4he/my_talking_pet_pro_apk_download.pdfIn PDF document text
    • http://cenderaoriginator.com/how_to_quit_smoking_book_free_downloadyhi2h.pdfIn PDF document text
    • http://tiwigibafofovit.iblogger.org/pinexogabuguwekewizep.pdfIn PDF document text
    • http://cmbmarketing.agency/gikoponidelulifwz3d.pdfIn PDF document text
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/ditogixa.pdfIn PDF document text
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/5617aedd9.pdfIn PDF document text
    • https://wizujepubenepax.weebly.com/uploads/1/3/5/3/135317151/9188703.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/ifgh1ja/jiffy_lube_coupons_conroe_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/cLIuGij/sims_4_level_10_doctor_career_cheat.pdfIn PDF document text
    • http://natlab.ru/manualidades_con_papel_periodico_canastas_paso_a_paso9nwa4.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/cee3d032-56e8-4ca4-9bfa-e7a71aec7936/mixotowawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f5666c-f46b-4427-ba61-2e7fd39b6027/gubowijiku.pdfIn PDF document text
    • http://fowasabitafal.epizy.com/10316469902.pdfIn PDF document text
    • http://fogidifi.epizy.com/tamefevifigakoxetuxijes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b7f253-dd06-49d8-91b3-d9b57b0b0ba1/bubuzuruxojetupete.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_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 5056 bytes
SHA-256: c7611f6bb94719d0d53991ca487168d92cff5934bd849c4a6786a28d60b7e8cf
font_01_sfnt_off000100fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FC 11300 bytes
SHA-256: f4d84979bd244ac039159c5a9f73d4460980ddca0d124d350ff59250c323d026

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