Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2563682e89e4ff…

MALICIOUS

PDF

65.2 KB Created: 2020-11-10 14:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 49ad09e01b938837b3a71e130363a986 SHA-1: 2cae7d670d46e36761b7e7507b90f8aa4a35b8e8 SHA-256: 1a2563682e89e4ffae9a6e92b66959a08a02156115e3cfbbba721e5937d5f0b1
254 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a redirector infrastructure designed to host SEO spam and potentially distribute malware. The document body, though heavily obfuscated, suggests a lure related to a movie download, indicating a phishing or malicious download attempt. The presence of a critical ClamAV detection and ML classifier flagging further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/123?keyword=weathering+with+you+movie+eng+sub+torrent In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f8ebb94ca2da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fa486dc6e6df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fa8bab0992e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5f94e9ed838a2.pdfIn PDF document text
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/9631925.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cfbe32b-0579-4746-83c5-9756910b5b1e/kelefum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a926673-7b46-4d0a-ad2e-f88c0fe74a10/47911100056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da597fd6-d3c4-49b8-9385-f35f38828a35/godokafevavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84eddff-68dc-4582-8e67-05880b36ddee/58014017751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c3cee0-78e1-4952-9f37-6a7227fb2b04/59833108334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f5b090-76bb-4207-b0bf-b56daa232274/segevejupezukixinudiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a22c58e-0697-4b33-9987-a3bec339aa08/wetezonekanipebizak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098940f2-80fe-4fe5-b075-276cb94223b3/gazutivevabevikavuben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc3d2be-3917-4385-8361-bc6932cdbceb/slope_standard_form_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d903336-8770-40a6-9304-871a857ab19d/frases_de_jesus_cristo.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_off0000ae09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE09 5476 bytes
SHA-256: c77dbb476a67f944ce742a92a89b7cfd6344dfa2b73f59e770829ffae4075e40
font_01_sfnt_off0000c09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09F 9828 bytes
SHA-256: 82984c7269d162ecf613db9a9d927f224321ce541486923d261f7966a70ca84c
font_02_sfnt_off0000e272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE272 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06