Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2e7b2dc1fa3621…

MALICIOUS

PDF

83.1 KB Created: 2021-04-19 16:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 119d65349705e3b1757ad6b3355ae938 SHA-1: bd2f7f2c99c5d0b08dc9f6f7f8a413d6b18ef5cf SHA-256: bb2e7b2dc1fa3621a726e2e6981a96f6cc69dee8145fe71f9d78c92609375fc8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and are indicative of a link farm used for phishing. The primary URL, 'https://maypoin.ru/strik?utm_term=how+to+build+rose+petal+cottage', is directly associated with the phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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
  • 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://maypoin.ru/strik?utm_term=how+to+build+rose+petal+cottage PDF link annotation
    • http://sozapemogoz.mygamesonline.org/wozig.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/67092239274.pdfIn PDF document text
    • http://kodavuviguwu.mypressonline.com/lipid_guidelines_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/MQgchbQ/cat_makes_clicking_noise_when_walking.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/hindustan_unilever_limited_products_list.pdfIn PDF document text
    • https://kovibokasekur.weebly.com/uploads/1/3/4/8/134880184/d77fb37b41f8.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/b6ihia5/95230542361.pdfIn PDF document text
    • https://nibivesulekot.weebly.com/uploads/1/3/4/0/134017222/bulari.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/jibgdhe/blablavouchers._com_voucher_codes_and_deals_walgreens_photo.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/hazBzgh/hardcover_spiral_notebook_journal.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/76369703000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_0eddbfd0794849f79af85fa8c2010a6b.pdf?index=trueIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/zapixapodenopezizasiwona.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/comptia_network_study_guide_2020.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/frise_chronologique_histoire_cm2.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_4c2700e3e37d4ac6b637d94c620b0ae6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/chest_guidelines_2016_update.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_6f1a838e6038426d872f22df686b1ba2.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 2960 bytes
SHA-256: 4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311
font_01_sfnt_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 5436 bytes
SHA-256: 55f5a387e21d4eb4c94fb0c02dc675fa2e4f817bc18ddb2bc0366cc0f6b203c7
font_02_sfnt_off00010163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10163 11532 bytes
SHA-256: 91a9d9f45a699a4b0d3e1a62bb721693d48691c1c104eda7c15af50e750e32fa
font_03_sfnt_off000128df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DF 16264 bytes
SHA-256: f3d57df04cdb194e46cfff8b4835c5d2f279e7288315b2039a53678039656b22

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