Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c224642a27f290…

MALICIOUS

PDF

75.3 KB Created: 2021-06-01 16:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d7bd73ab43e0c3793c7d06362b76fb02 SHA-1: ad9e02b2c04b7739006e3199143f35ebcf4fc610 SHA-256: e5c224642a27f290ca9870252dead210440fc5553f4f8f828613c16509dfabca
206 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, many pointing to disposable hosting services, designed to trick users into downloading files. The primary lure appears to be related to movie downloads, as indicated by the URL containing 'slumdog+millionaire+full+movie+download+hd+in+hindi'. The presence of malformed exploit streams and a high ML classifier score further support its malicious nature. No scripts were extracted, but the structure suggests a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://chcial.ru/pbw?utm_term=slumdog+millionaire+full+movie+download+hd+in+hindi PDF link annotation
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/wupimox.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/xunuroliforererepo.pdfIn PDF document text
    • https://milanesove.weebly.com/uploads/1/3/1/3/131383497/cb2938fc29f2f53.pdfIn PDF document text
    • https://sazaburesifug.weebly.com/uploads/1/3/4/2/134265765/6f1f20920890.pdfIn PDF document text
    • https://mobefoba.weebly.com/uploads/1/3/0/7/130776725/6150f2336003f.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/jukinejenute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418587/normal_60055d24cfa1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393639/normal_600960907b2d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478137/normal_5fe1c1fc54858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5fcb684a45584.pdfIn PDF document text
    • https://jibuzuku.weebly.com/uploads/1/3/0/7/130739289/6145179.pdfIn PDF document text
    • https://pitatulepuz.weebly.com/uploads/1/3/2/3/132303378/fulonifedikuk.pdfIn PDF document text
    • https://zanikegira.weebly.com/uploads/1/3/1/4/131437850/d968a1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gatasulupu.pbworks.com/f/change_32_bit_to_64_bit_windows_8.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/senonevowojuwozigo.pdfIn PDF document text
    • http://bamedun.pbworks.com/w/file/fetch/144457734/64868873096.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144424632/hoi4_uk_multiplayer_guide.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/xozisiperuxutijul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7427f05-08f0-4aff-86e8-055d39003bea/92510108405.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144427011/61117999989.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144420996/siwin.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/w/file/fetch/144440475/how_do_doctors_check_for_astigmatism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e5be091-ee76-4511-b54b-29193e63c370/bobufejijozatenujot.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144436482/43715869180.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144454131/music_zip_download_sites.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_off0000e8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 5400 bytes
SHA-256: 43580ad1b91a0b5eec0556893e185dcb2d0f7361a93dd327879f08d4c31bef01
font_01_sfnt_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 10660 bytes
SHA-256: 2b093647db4945d0955dd64514fd64af729a4bfd7a03293906d47a48e503994f