Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e87be3c1e6f7109…

MALICIOUS

PDF

63.6 KB Created: 2021-02-25 03:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 04882d1a3681181e7d4d927340a773a0 SHA-1: 43ea83a7ae5b122cab45ea46d2926ca1538f1eaf SHA-256: 8e87be3c1e6f71098e802d0310289353906098fb259ecb553f5f788c3e580bb7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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/award?keyword=minelute+pcr+purification+kit+sds In PDF document text
    • http://xoziduso.mypressonline.com/at-lp120-usb_78_stylus.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/pematoxukomixit.pdfIn PDF document text
    • https://kemavejikokawi.weebly.com/uploads/1/3/2/3/132303077/601230.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/do_chrysanthemums_self_seed.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/murray_lawn_mower_dealers_uk.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/bc9c14aeb3.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/what_is_the_newest_ps_vita.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_60000aac544a0.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/jhhcxgi/97367315894.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/44258924584.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/the_interpreter_of_maladies_setting.pdfIn PDF document text
    • http://gikisivota.iblogger.org/23971135660.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/lugunisininum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolatuziguxobe.rf.gd/yealink_sip-_t40g_datasheet.pdfIn PDF document text
    • http://gukerarewaf.epizy.com/spektrum_dx7_manual_espaol.pdfIn PDF document text
    • http://bemijeranokawu.epizy.com/throwing_knife_templates.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE45 5216 bytes
SHA-256: 21b4f46abf74d1dafa1306a043857610cbca1d4bcacc241ed93bf81dbf594326
font_01_sfnt_off0000d01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01E 9700 bytes
SHA-256: faa76315fb2524fe6c93633c1b28df933f676e0f57058a1b4ad7094e21e54154