Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b986c7a4f2c024…

MALICIOUS

PDF

69.9 KB Created: 2020-12-17 01:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6bd6c9c0b47c0068a03a454570aa75f5 SHA-1: 47fd6300ba005eea9e2be3ace2710fd4643176c3 SHA-256: 65b986c7a4f2c024b963857fb2da8b95f7615599578502ae69e965786805516c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs points towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=liberty+high+school+bedford+va+baseball PDF link annotation
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/be77392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493282/normal_5fd0b49da330c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_5f9e7f68effce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392649/normal_5fcc0d99cfcd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_5fbcb90f12234.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5fc6bade9c7f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/opening_dragon_ball_gt_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/jingle_bell_rock_bobby_helms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65a04ab79f442f24ead5b/t/5fc6fee5ad3e6411923aba52/1606876901893/wix_email_domain_pricing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc296815e8e827d4298a2f8/t/5fc7bdae6beae4543171db70/1606925742520/ralabevupodezakatadoloraj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5932f0b6b03258f55155a/t/5fc82761e101942bf765acff/1606952802439/agar._io_mod_apk_macro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5dc63f7cf8c75404cc06f/t/5fd036c1a946005758769b99/1607481025700/uefa_champions_league_results_yesterday_matches.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c5aef7cf8c75404c2941/t/5fd1c74d87bef85997ee73f2/1607583566352/41088488162.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7bbd303f04e270fe68033/t/5fd1a2389a9e5443ac772846/1607574073283/19492556762.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/counting_on_worksheets_year_2.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD41 5528 bytes
SHA-256: d3b3f01eaed907a73339ebfb023c634e02ff28c7b6daa24f0ac4c1084a9df09f
font_01_sfnt_off0000d01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01A 10744 bytes
SHA-256: 6c3244c7f4dc77764f1f8604238144f097b7ef9f782c4407143482d72d2d0caa
font_02_sfnt_off0000f53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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