Malicious PDF — malware analysis report

Static analysis result for SHA-256 541f7386db7e35b3…

MALICIOUS

PDF

78.0 KB Created: 2021-02-13 04:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 86cc4b8af362a3cda246571dd39cf678 SHA-1: 1cbd3c5ad4ca1fa1eed08113f7cae938b4e77ff9 SHA-256: 541f7386db7e35b39cb37dc0cd8e137dcd4d7879e6cc8eafd7957f00ce00f164
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL, https://jottigo.ru/123?utm_term=boat+ignition+switch+problems, suggests a phishing lure related to common search terms. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it likely attempts to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=boat+ignition+switch+problems PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5ff779e14ab12.pdfIn PDF document text
    • http://a1metromovers.com/aaa_shell_fuel_rewards_program07zso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375518/normal_5ff040659a3bb.pdfIn PDF document text
    • http://dajinanumiki.iblogger.org/3513194708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378405/normal_6008effdab085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_60200a89c106a.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/fEIhTBh/9571468564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481676/normal_5fda43cd92ebe.pdfIn PDF document text
    • http://gigogon.22web.org/29784907751.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/XsNC2Q9/jolteon_moveset_gen_1.pdfIn PDF document text
    • http://net-klientov.ru/nagdev_bhojpuri_movie_mkvtrac6.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/lynx_grills_downeytmn4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_6017f89434825.pdfIn PDF document text
    • http://madewithsunshine.com/freebies_no_strings_attachednbea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_6014e6c57367c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455376/normal_5fe2a97e718dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5fd29579b00ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rasiwimuweb.epizy.com/38207772856.pdfIn PDF document text
    • http://dodujorumapide.epizy.com/43598590454.pdfIn PDF document text
    • http://robexekipojop.rf.gd/hormonas_placentarias.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 5416 bytes
SHA-256: e92ca3914869705ccb88c5b4fec58afc0be75a8b0ce03f360dff5437877ec04d
font_01_sfnt_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 10088 bytes
SHA-256: abd661c4ba1a36ce9544473e6863ebbc2a2c2e98bb5e8aba4df79106687f93ed
font_02_sfnt_off00011c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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