Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8bc8e759617ac4…

MALICIOUS

PDF

77.5 KB Created: 2021-01-05 10:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 53531b5065b504014acdb4805340bfc7 SHA-1: 98123a7211fea308bfaa30358962061fc074a557 SHA-256: ca8bc8e759617ac48f67398575a5ba0476ba57874d27cd9dffb7b8f4b26ac7e7
254 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. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/123?utm_term=english+collocations+in+use+%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF In PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/nixinurawogig.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/4699567.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/zawapabipo.pdfIn PDF document text
    • https://gugozakeku.weebly.com/uploads/1/3/4/5/134588211/55e77de8448.pdfIn PDF document text
    • https://fuwizugirizuj.weebly.com/uploads/1/3/4/6/134611345/ac7fe5cfb138.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/de775f3f-16c4-4424-8245-7e09c4ed1a84/guided_meditation_spirit_guide_sleep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a434d8f2-f1c3-4f0d-86e5-7a9980bfed42/juturijazixelux.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/secret_video_recorder_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01028dbd-c151-4ff6-824d-34ef9a6a60a8/lucina_combo_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/34131499823.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/delaware_llc_annual_report_fee.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/calibri_bold_font_ttf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f09f72b-c14b-4de5-96c6-2f2924dc850c/gesisipirosulibanokorab.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

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_off0000db70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 4924 bytes
SHA-256: d068e399f02b1a912e0ea9bf324c9ff25f0790db575c81eb2771bdce0c71974d
font_01_sfnt_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 10328 bytes
SHA-256: 78bf7b6f87a0842b0b30d3eb2eb27996a66b8d0f99f148127a02d3ef452aa241
font_02_sfnt_off00010fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 16496 bytes
SHA-256: 25fac1f4d76e901e905d96b2d5eda01e85ce5a518ad47323f9aad8b2555f9010

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