Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e003a38a35b35b2…

MALICIOUS

PDF

114.3 KB Created: 2021-03-22 01:24:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 022f4b208d16d205e76b43c16399f9ed SHA-1: 1cb6f512e0c9e28a0348d4e652068ab2dbc98aad SHA-256: 8e003a38a35b35b23af1eb34fd6004639c5d2015e4c6949dba3179b3f44a8f8b
134 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Tamil news paper pdf download' and is associated with external URLs that are likely part of a phishing campaign. The presence of multiple external URIs and the 'Fake invoice / payment lure' heuristic further support a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jumiwimov.ru/award?keyword=tamil+news+paper+pdf+download PDF link annotation
    • http://dfwshootersupply.com/98005149967texxx.pdfIn PDF document text
    • https://zodosibuje.weebly.com/uploads/1/3/1/0/131070625/jodamoregogetitar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_602b7f8899b75.pdfIn PDF document text
    • http://matteset-spon.space/solving_compound_inequalities_worksheets606mc.pdfIn PDF document text
    • https://junowebabozem.weebly.com/uploads/1/3/5/9/135965754/farewijepekasoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_6022225291cc7.pdfIn PDF document text
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/2897896.pdfIn PDF document text
    • http://zhigina.ru/danuwge0td.pdfIn PDF document text
    • http://nujiwuwuxazasu.iblogger.org/liwevuvalam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450502/normal_60064f762f0d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451376/normal_5ff07b2d770ec.pdfIn PDF document text
    • http://bivemipizejon.22web.org/72596635210.pdfIn PDF document text
    • http://xewosaxebojufir.iblogger.org/monk_character_sheet_5e.pdfIn PDF document text
    • https://minetoleletumu.weebly.com/uploads/1/3/4/7/134767865/8891207.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5fe40c60e1643.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://xomezotesojopuv.epizy.com/90610794892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582fd90c-d2e4-4085-8311-255a582ca31e/10160022400.pdfIn PDF document text
    • http://tavudedenudisuj.epizy.com/sherlock_holmes_part_2_full_movie_in_hindi_download_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66db8d1d-e416-4e41-b495-095240ae8c44/3rd_grade_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a896c98-2055-465c-83e5-100d72bf08b4/how_to_write_a_short_bio_about_yourself_for_work.pdfIn PDF document text
    • http://memaded.epizy.com/fufisalure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586d0aed-5e3c-4a30-bc9d-05d086854945/thermo_king_apu_code_ac5.pdfIn PDF document text
    • http://vuwadiwotaja.rf.gd/77868397277.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB7 5228 bytes
SHA-256: 6477e58235d2966818cfa4dc9091a3f562da7a4cb78eaf70768aea5010585f3e
font_01_sfnt_off00016c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C75 4220 bytes
SHA-256: 606157225d4ff6436cd578acf3617b25f5851e3bb57590fb0e89a802a6c5437a
font_02_sfnt_off00017aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA8 11932 bytes
SHA-256: e383756953a802667aa7f8879c2c93af3b6525f2a92883bc94f00317dd52a5e2
font_03_sfnt_off0001a367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A367 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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