Malicious PDF — malware analysis report

Static analysis result for SHA-256 908c9ea8a0285b1f…

MALICIOUS

PDF

94.8 KB Created: 2021-02-13 03:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 27be461af154e955a4d6ec65204e258f SHA-1: 20268cc94b815dbdd243715461173713d8e13198 SHA-256: 908c9ea8a0285b1f2e3c2e542579d845d9901203f20d21c2cef5e1c8e1e60edc
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs, such as 'https://crophysi.ru/123?utm_term=calendar+2019+and+2020+south+africa', are likely intended to lead users to phishing or malware distribution sites. The ML classifier and ClamAV detection further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=calendar+2019+and+2020+south+africa In PDF document text
    • http://filmera.ru/92927222387g0zev.pdfIn PDF document text
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/derom_pewomesixepowu.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/5782b5cc4.pdfIn PDF document text
    • https://dabelebixoxo.weebly.com/uploads/1/3/5/3/135310161/622057ef0d8e.pdfIn PDF document text
    • https://balolenitazir.weebly.com/uploads/1/3/1/0/131071159/sewiboduvuredof-wesaxo.pdfIn PDF document text
    • http://purpless.vip/magujifuro5lpi8.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/fkvhe8D/47512251535.pdfIn PDF document text
    • https://cdn.sqhk.co/seranowe/jyzeNTS/20564347712.pdfIn PDF document text
    • https://vagezelez.weebly.com/uploads/1/3/0/8/130873856/27407.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/senodiw/29979831032.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/disasiwuwesuni.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/gastroc_equinus_deformity_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/bsc_agri_online_form_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/basis_bilangan_bulat.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/java_tutorial_for_beginners_ebook.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_off0001342e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342E 5496 bytes
SHA-256: 234a4885687f2b9b17e0a594ce5de7cd29b5c28e14c120a340a26b556d0d7be4
font_01_sfnt_off000146cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146CF 11420 bytes
SHA-256: 0dc3af7753c36dc78d7bee383aed5090817b1709b184cf3379ced69b7edf0d76

Open this report in the interactive analyzer, or submit your own file for analysis.