Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42ffb9d52916ec5…

MALICIOUS

PDF

87.1 KB Created: 2021-01-10 02:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 025d0f99f585665365790e644e76cdf1 SHA-1: 8357a6ec42dc428b9b5e79b68f385c120ae007cd SHA-256: c42ffb9d52916ec5cd78880988a4426ec524ac64a4486e0454738329245a1c4d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, many pointing to PDF files hosted on services like mozfiles.com and weebly.com, suggesting a link farm or phishing campaign. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://trafftec.ru/123?utm_term=due+in+spanish+translation PDF link annotation
    • https://site-1198654.mozfiles.com/files/1198654/43209465553.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/7711077.pdfIn PDF document text
    • https://site-1177219.mozfiles.com/files/1177219/happy_birthday_cake_gif_with_music_download.pdfIn PDF document text
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/vomavapapebulilibe.pdfIn PDF document text
    • https://pasadotofeb.weebly.com/uploads/1/3/1/4/131482919/759161.pdfIn PDF document text
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/karozerijitofo.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/484f4bee87974.pdfIn PDF document text
    • https://defugelunek.weebly.com/uploads/1/3/4/5/134524545/lavukemojedoxam_wumolesif.pdfIn PDF document text
    • https://site-1176323.mozfiles.com/files/1176323/evolution_dragon_pokemon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/arya_telugu_film_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/84496976602.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/join_australian_super_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/qasidah_man_ana_laulakum.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/xisojesipo.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 4252 bytes
SHA-256: 51b1de5916ae38e4332292426b396c3ddc8292395d63e42f3f385c5d8dedd999
font_01_sfnt_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 4908 bytes
SHA-256: 91a5ebdc3a60f93c8b6042523dcd7951aec9e25a12b414db1982fb54895631dc
font_02_sfnt_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 5872 bytes
SHA-256: 26d58a392ec38a372130af4fb95c013bfbfe47aa4beee5c7e1e500c8182549de
font_03_sfnt_off00010de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 14532 bytes
SHA-256: a56f4c5672b95fd9554d0354c42e5fdb6ab1d2e9159c4c0f518dd7bf6b54e795
font_04_sfnt_off00013989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13989 16164 bytes
SHA-256: 88c3c370bc217ce99402004a4f0b15234af75785b8fae5360a4d1f01bd4ac368

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