Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a4046891a1145b…

MALICIOUS

PDF

68.9 KB Created: 2021-02-17 05:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2e5f057ccf37d00164505d16ff1bc46e SHA-1: 6c2d4e9f7ec0c369426e5e43a2dd05c4a2eeb0b3 SHA-256: a5a4046891a1145b8161f21b71552433bf6c5654f72b114da8c087b82abe7a15
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://yafferge.ru/wix?keyword=sacred+sexuality+muata+ashby+pdf In PDF document text
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/6359005fe2e.pdfIn PDF document text
    • https://tixuguzuw.weebly.com/uploads/1/3/4/0/134096155/37b13a483.pdfIn PDF document text
    • http://memaviwebepa.22web.org/nepidupuwuvokivida.pdfIn PDF document text
    • https://sumejuloluguwir.weebly.com/uploads/1/3/5/3/135390827/1561846.pdfIn PDF document text
    • https://sezorataxij.weebly.com/uploads/1/3/4/6/134600708/rebuvodivugipef.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/195383.pdfIn PDF document text
    • http://fortuneo.biz/hentai_girls_stripuiupl.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/9475701.pdfIn PDF document text
    • https://lodotimafigu.weebly.com/uploads/1/3/5/9/135981467/ccb1d0688c185.pdfIn PDF document text
    • http://rakuwotakiko.22web.org/asuran_movie_bgm_free.pdfIn PDF document text
    • https://lumezoti.weebly.com/uploads/1/3/4/8/134863392/saluxawesej-xonazesadunux-lukuvowuxorew.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/tudefetetor.pdfIn PDF document text
    • http://invitesistem.ru/57796542755ci6p9.pdfIn PDF document text
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/dbccc1638caa6d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rezujadutifinom.rf.gd/96181741498.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/30859382522.pdfIn PDF document text
    • http://romotugujelit.rf.gd/17875668536.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/oldies_chinese_new_year_song.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_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 5808 bytes
SHA-256: eac8b1b74e355b8f71e7800959f1fb3536e6eb5e4f4bcd3a7a1679a2e3408ada
font_01_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 10728 bytes
SHA-256: b7cf394abb2ae6803854e74b429d86b639be887b9ffa04d153b59360157212b9