Malicious PDF — malware analysis report

Static analysis result for SHA-256 e243d0e773bc4aab…

MALICIOUS

PDF

74.1 KB Created: 2021-01-17 15:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9aec60a20fbfa91dc486588e5039958b SHA-1: d243876d239343991842e9db0d6405906c3e503f SHA-256: e243d0e773bc4aabe1153ac55d44e34825dcc64bbdf32cc54a34de1b0b897641
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, and the ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though obfuscated, contains a search query related to 'female reporters killed in vietnam', suggesting a lure to drive traffic to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=female+reporters+killed+in+vietnam PDF link annotation
    • https://cdn.sqhk.co/liwewajawab/L9tQih4/knights_templar_cross_necklace.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/iiajfib/musadixoxivopimut.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/jijewumasoxit.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/pewifawarinud.pdfIn PDF document text
    • https://cdn.sqhk.co/mazinatefoso/iemDjAR/20774108195.pdfIn PDF document text
    • https://zaxavafu.weebly.com/uploads/1/3/4/3/134323176/3370c09143f.pdfIn PDF document text
    • https://sufotope.weebly.com/uploads/1/3/0/7/130775917/5196409.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/wagul.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/Dhaggid/come_creare_uno_stickers_su_whatsapp.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/nonipesikiri/full_form_of_dolby_atmos.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_off0000e5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5ED 5184 bytes
SHA-256: 929e03ce03d6dc21e9d92b52b6cc4e118af137eac212dfece93988e78d788f49
font_01_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 10776 bytes
SHA-256: bfd558e987e6c6e4b73b3e99ce3705c190a4302de49c94ef9ce1c8747256e2e9