Malicious PDF — malware analysis report

Static analysis result for SHA-256 168a8fe371dabdab…

MALICIOUS

PDF

75.6 KB Created: 2021-03-16 17:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f6aa8ab89321d75197d4a514cff3edf4 SHA-1: 657bad8e330310939e0d91b7be7d09a861aec2c4 SHA-256: 168a8fe371dabdabc7984cfe0c5830948b057aa473d2d34ad64307dad6d71c71
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The embedded URLs point to various PDF documents, likely intended to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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.
  • 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://nipisod.ru/wix?keyword=schwinn+bike+speedometer+manual PDF link annotation
    • https://fowerorizer.weebly.com/uploads/1/3/1/8/131856705/4858600.pdfIn PDF document text
    • https://fuvukajewub.weebly.com/uploads/1/3/3/9/133999399/molufaruwobefezezav.pdfIn PDF document text
    • http://skameyki.club/taurus_man_secrets_free_downloadc2xro.pdfIn PDF document text
    • http://tk-pobeda.site/97863382947b2jh9.pdfIn PDF document text
    • http://creditscorehelp.info/angaar_bengali_movie_mkvqlqwn.pdfIn PDF document text
    • http://5coupons.info/88038767756qljiz.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/7108168.pdfIn PDF document text
    • http://myimperfectmomlife.com/liwekalutavexdpsyo.pdfIn PDF document text
    • https://sarerudaguf.weebly.com/uploads/1/3/4/3/134373173/navuzorupo_zonawofoza_barolazip.pdfIn PDF document text
    • http://nikecortez.net/the_holy_quran_text_translation_and_commentary_free_downloadwk0dh.pdfIn PDF document text
    • http://furniture21.online/love_story_album_song_movieq8h3s.pdfIn PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/6218040.pdfIn PDF document text
    • http://the-job.ru/496593536108e4aq.pdfIn PDF document text
    • https://kitozegukelod.weebly.com/uploads/1/3/6/0/136056839/boxinasasepofafibip.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/gjgS1Et/nitigupawidedek.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/what_happened_with_la_la_land_at_the_oscarssi237.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/geuj8ic/ganja_farmer_weed_empire_apk.pdfIn PDF document text
    • https://fogorito.weebly.com/uploads/1/3/5/3/135322632/tebopob-bugatemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/034caee2-3885-4955-9c18-d309ff0cd660/easy_to_understand_emily_dickinson_poems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabc183b-088a-48e5-8807-3c6859585bff/arduino_nano_3.0_schematic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55cb9084-3c80-48e6-b09c-d47e5295f674/self-determination_theory_van_deci_en_ryan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2e46c4-7fab-4eb4-b279-0e4eaaa75db3/manifiesto_comunista_libro.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_off0000e93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 5712 bytes
SHA-256: d1869e4327fd6c392bb38ed54015a00fd345a578f58119adaa8e7c3366dd1763
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10636 bytes
SHA-256: 6c7ea6cb9e48d36ddf3ced4bdf3fcf877c67686db364659cc10ea13276a95d59