Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ccca96cc7d79b3…

MALICIOUS

PDF

72.8 KB Created: 2021-01-22 01:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fc70c2814c9b4f319854752aa7e3b5e4 SHA-1: 55d202687f5579f3526795a761733bfeb3f0c61c SHA-256: c6ccca96cc7d79b331b1f00364847e3aacf13bb988a98b6e49e7cf71f2881312
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://traffset.ru/123?utm_term=elf+cream+blush+soft+peach', is a primary indicator of the malicious infrastructure. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of techniques used to distribute malware or phishing content.

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://traffset.ru/123?utm_term=elf+cream+blush+soft+peach PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416666/normal_5ff2e517875ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ff812c3cf0ff.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/hawhhjk/75212499726.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/geVfjb5/reverse_tie_dye_hoodie_designs.pdfIn PDF document text
    • http://lalexejiwisejul.iblogger.org/breville_juice_fountain_model_bje200xl_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5fdba2c0a7700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ff92c6e6d62d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481671/normal_5ffd1b26a20f3.pdfIn PDF document text
    • http://puzotupisebi.66ghz.com/bibovak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5ff585c0bf38c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcee16def6f6.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/6365760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426960/normal_5ff1698ee2609.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/jjewicR/84502773742.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/gi1hhv5/nasenenijur.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://s3.amazonaws.com/gifojuxaxeva/android_version_for_samsung_s6_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/ruvoluzuboxuvusikuwej.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/11648530506.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/90105430143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD027 5080 bytes
SHA-256: 76bbbcdbad6d26b29659f04c9ee37b61bb16a2e00c820c5b9d1380c75d5446d0
font_01_sfnt_off0000e163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE163 10876 bytes
SHA-256: e978341f6b8d6343edb6f09dbb0d1c14f84f3b8354e2f3d4550b72d6bfcbbd90
font_02_sfnt_off0001067f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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