Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8d9bb3f6fc4858…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 16:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a5aa937b576e3d7be79064cb504260 SHA-1: 51f6fbda8775b3e406bed8f78788ae12de44e734 SHA-256: 0c8d9bb3f6fc485859ea2a7c83fbf550a510c44c77c0ba50883320b81d1d6e38
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as PDF files, suggesting a link farm designed to attract traffic or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URIs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/award?keyword=bhagavad+gita+gujarati+pdf+free+download
    • https://muzuwetabez.weebly.com/uploads/1/3/1/4/131483468/fapelej-buposa-muvafoxebibog-pubuzazexaru.pdf
    • http://ziduruwekomowob.iblogger.org/megizegakus.pdf
    • http://lebedugipul.mywebcommunity.org/form_style_and_meaning_in_byzantine_church_architecture.pdf
    • https://cdn.sqhk.co/sotatixorawi/eE2jgd4/ballpoint_pen_art_for_sale.pdf
    • https://mudufisapegew.weebly.com/uploads/1/3/6/0/136097401/3161228.pdf
    • https://cdn.sqhk.co/wubunepan/jiMshaD/angry_ip_scanner_android_app.pdf
    • https://cdn.sqhk.co/befozaxulot/hjfppgj/xawutukeweraz.pdf
    • https://cdn.sqhk.co/lipisedopila/jj6U6A9/kugidiligoguloz.pdf
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/490093ebc951fa.pdf
    • https://cdn.sqhk.co/bajipugotox/uhiikJj/scentsy_warmer_of_the_month.pdf
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/lezutivu_sugikad_texikulomoren.pdf
    • https://lemarowaverixax.weebly.com/uploads/1/3/4/3/134371099/653c40c1ed12b9.pdf
    • https://cdn.sqhk.co/fagiseregu/hyrghgc/forex_trading_for_beginners_2020.pdf
    • http://punejew.mygamesonline.org/benogaxonarajodo.pdf
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/gafuzi.pdf
    • https://somizinizerolu.weebly.com/uploads/1/3/0/8/130873918/8897163.pdf
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/bawez-jaxebelebejasu.pdf
    • https://cdn.sqhk.co/xovujiroveg/Ohd3he9/ncert_books_ncert_solutions_for_pc.pdf
    • https://cdn.sqhk.co/sowanigog/hP1gUzd/hyper_v_live.pdf
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/39aa95c383048fb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pinixivula.epizy.com/ruvujogiperaxepojiwumuvub.pdf
    • http://jezevenakos.myartsonline.com/68185956873.pdf
    • http://kasupetaderimit.rf.gd/how_to_draw_anime_girl_hair_pigtails.pdf
    • http://lotarikavim.rf.gd/wasulemu.pdf
    • http://nabafutig.myartsonline.com/16962267799.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb9.bin
9f55abda3d23ec802e18c03a92d3d9c02df8f435e4304b2b5ccab8342c54a76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 5400 bytes
font_01_sfnt_off0000ee34.bin
302f094803af0066b4825f489ff0585f0090df47991e45ec806ff79de9887147		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 10628 bytes
font_02_sfnt_off0001125e.bin
fb36930b6158726aadc5cec8e2937717261789c1ed468292f33a1ffb1951f124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125E 16172 bytes

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