Malicious PDF — malware analysis report

Static analysis result for SHA-256 f686bce0ff0aff5d…

MALICIOUS

PDF

85.8 KB Created: 2021-03-16 10:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0fdc9e0e8774e8ad4a4ae011d186ac53 SHA-1: e9915535b96b0af4cc72e12aeafc8693f7e99cb2 SHA-256: f686bce0ff0aff5d088e5fc7e3a4fc82455573acfe04bdcffa80298da4df24d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/strik?utm_term=c%25C3%25B3mo+es+la+metamorfosis+de+una+mariposa PDF link annotation
    • https://rarozevalir.weebly.com/uploads/1/3/1/4/131437937/9112435.pdfIn PDF document text
    • http://hotloveme.online/are_smoke_alarms_supposed_to_blink_red6h1ft.pdfIn PDF document text
    • http://universityru.fun/brother_mfc-_t810wstb03.pdfIn PDF document text
    • https://giridoxaxe.weebly.com/uploads/1/3/4/7/134703098/e9901af4687.pdfIn PDF document text
    • http://busurman.space/82270518213vyoa5.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/2020_epi_week_calendar.pdfIn PDF document text
    • http://tur8osale.site/3_rules_for_writing_scientific_namesuj4b0.pdfIn PDF document text
    • http://apsmall.space/chicago_style_citations_guideqsgg7.pdfIn PDF document text
    • http://copyrightshelpcenter.com/how_to_answer_common_scholarship_interview_questionsf64fr.pdfIn PDF document text
    • http://ewwe.space/69616827582t3a55.pdfIn PDF document text
    • http://namsinc.info/mitsubishi_medallion_hd_1080_wont_turn_ono4h4s.pdfIn PDF document text
    • http://kernig.store/what_do_you_do_when_your_kindle_wont_charge1p0kk.pdfIn PDF document text
    • http://copyrightshelpscenters.com/bills_of_exchange_act_1882udaa3.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/nafivubiwugewipel2q9ve.pdfIn PDF document text
    • http://blacktea.space/40492239638le19x.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/e3e07f55e4b068f.pdfIn PDF document text
    • https://zibezalobe.weebly.com/uploads/1/3/4/5/134529300/6271628.pdfIn PDF document text
    • http://pe50off.pro/tear_soup_storyunnil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jadere/6858739170.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/14446662338.pdfIn PDF document text
    • http://xejawaji.myartsonline.com/ashrae_acca_standard_180.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/sepomorozepavupusen.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/32451231823.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/40002644968.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 5228 bytes
SHA-256: f554ba7c89f269b2861e3d1cf5ed869e0090a2a5610c49d2bbb266caee8bebfe
font_01_sfnt_off00010e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E02 11056 bytes
SHA-256: 281aed5f37d583f561356c94b46d417cb3e7cf33d029f208734871368b13c544
font_02_sfnt_off00013286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13286 16084 bytes
SHA-256: ac8bf562210f9163fcb9214d3b5b8e5576665f260beeea2276f286b91eb3ef2a

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