Malicious PDF — malware analysis report

Static analysis result for SHA-256 4485843d55ead519…

MALICIOUS

PDF

75.6 KB Created: 2021-01-03 02:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a338c81f63965e7cf49c03f1dfb5ba74 SHA-1: 8adc4202018953f0751c4fe4b62ce7d2ff924d9d SHA-256: 4485843d55ead519d789a125572c4ca1ae572cda8a23567a1d6f567f3dad0264
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=que+significa+santificar+las+fiestas+para+los+catolicos PDF link annotation
    • https://kelubipo.weebly.com/uploads/1/3/4/8/134891634/dibilanejufelo.pdfIn PDF document text
    • https://tiramanab.weebly.com/uploads/1/3/1/8/131856622/misutuzotamigeg_negadumoxunigu.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/ipXjaji/83654194131.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/np4bmjb/99906332818.pdfIn PDF document text
    • https://wiraxupafetob.weebly.com/uploads/1/3/2/6/132696263/5922903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/08f7ff58-67c7-48b9-a5a3-f57310989757/the_body_stephen_king_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/foundations_of_aural_rehabilitation_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/why_should_we_not_cut_down_trees.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/how_to_write_an_opposition_to_a_motion.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/gta_cheat_codes_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180e79fd-1ec1-47a7-9908-5430c822d3c8/quotes_about_unconditional_love_and_acceptance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a8e998-46b6-40bb-a986-66176e2a0782/5784695460.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/59035704253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/072078f8-3119-4b35-aaf2-74722228db53/nasawilurawopazaxal.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 5124 bytes
SHA-256: 5d41a152d6e1518179afe4b307dea1e51225c394b30bc3349e05007f5d6b8642
font_01_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 11136 bytes
SHA-256: a3928c26585eee698112d0d002d581cc8b3b9d0e9637adaaa9ef824d50454565
font_02_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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