Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc08cc03ed9fcf9c…

MALICIOUS

PDF

242.4 KB Created: 2021-05-10 22:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6a02b4401a65cbe8a3aa645f9e354feb SHA-1: 27c6d4d96218e23bf42e2e42b1090788d7bb1ca5 SHA-256: dc08cc03ed9fcf9c1846edc2a2da8cd90659c51a22940cf6c00d66b0437ebc08
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=how+to+change+batteries+in+garrett+ace+250'. This indicates the document's primary purpose is to lure the user to this malicious URL. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+change+batteries+in+garrett+ace+250 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_6006fd5fb2be6.pdfIn PDF document text
    • http://sakosoverunupa.iblogger.org/what_is_the_best_grohe_kitchen_faucet.pdfIn PDF document text
    • http://papawugamajube.mygamesonline.org/9957228640.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506131/normal_60008316e3c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_6056a8fb31362.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/chick_fil_a_breakfast_menu_prices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_5fe67984b49d7.pdfIn PDF document text
    • http://deviditiposu.iblogger.org/dexixetolebatewagi.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/xidapipodup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447434/normal_5ff9c8ef21f4e.pdfIn PDF document text
    • http://wopexobow.mywebcommunity.org/cluster_sampling_methods.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401540/normal_5ff0e4bd77c01.pdfIn PDF document text
    • http://samejeno.iblogger.org/24356163817.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/pazatuv/best_atomic_clock_with_outdoor_temperature.pdfIn PDF document text
    • http://pomukipokap.epizy.com/54041701061.pdfIn PDF document text
    • http://tefozofikiduja.epizy.com/kipejadoko.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/saxojotunofezalebikoze.pdfIn PDF document text
    • http://tapukov.rf.gd/wiczenia_gramatyczne_angielski_b2.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/nokixolum.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/can_you_repair_a_panasonic_tv_screen.pdfIn PDF document text
    • http://riluromeni.epizy.com/baremumigezosexotej.pdfIn PDF document text
    • http://tipisane.epizy.com/48599047299.pdfIn PDF document text
    • http://norilonabu.epizy.com/spotify_premium_free_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/8927640636.pdfIn PDF document text
    • http://sarososibi.rf.gd/dunamefujenogelifefaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/gapodokug.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003519c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3519C 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off00036190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36190 5620 bytes
SHA-256: 1082c397baa6d94274a1c68a36e0164260d7e689eeb30e73ac279454410fb187
font_02_sfnt_off000374be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x374BE 1644 bytes
SHA-256: f51e468cad89be37a6377395ae51ea56b7319975502e3545cb67ca15c9b82b03
font_03_sfnt_off00037d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37D1B 11604 bytes
SHA-256: 4d637e62288771df687d9a02d71b51d35a6fc40902b1026d87b863c1d9c5dc5a
font_04_sfnt_off0003a4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A4CE 16096 bytes
SHA-256: 416438fd0a6bf2b0fbbee90b75bae1eaaf4cf69236eda9052fd3a4450d1d3b12