Malicious PDF — malware analysis report

Static analysis result for SHA-256 8172a31f2137670f…

MALICIOUS

PDF

65.9 KB Created: 2020-11-25 02:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 15ca8f69359ad6be957998f944596c7f SHA-1: 7cf9632ff5ae9cc83e96084b6a6d66640b1008d1 SHA-256: 8172a31f2137670ff035b01355a5bd5986e05ad5a9f266d4db6707bf905575fa
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 platforms. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier also strongly indicate maliciousness, likely related to phishing or malware distribution. No scripts were extracted, but the primary attack vector appears to be directing users to malicious external sites.

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://trafftec.ru/strik?utm_term=porter+cable+oscillating+tool+blades+compatibility PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418567/normal_5fb4d0b823a4d.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/626386.pdfIn PDF document text
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/babiguzinani-wotowe-fikenido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5faae788cf2d9.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/5226278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f8df5c31cf58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8df691a2268.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/rejobekog-dumogatiwo-todopifiwamomil.pdfIn PDF document text
    • https://sowofinonapira.weebly.com/uploads/1/3/4/3/134361296/3559938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495985/normal_5fb3fe5f54a49.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/tuzamada/karuwepogexipok.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/66607784927.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/value_of_one_troy_ounce_999_fine_silver_coin.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/watch_movies_online_free_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/biography_of_hitler_in_hindi.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_off0000c3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F3 5636 bytes
SHA-256: 04c49def3eb50c9315c6bc00ae8537d72eef20ae288d705509ad4a3c3e6c2836
font_01_sfnt_off0000d708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 10508 bytes
SHA-256: 9cbcf7207b84f9cd96eb0877b66205715075276a210e758a5d1df2f9e77492b7

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