Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2b9ab917dc2e94…

MALICIOUS

PDF

74.3 KB Created: 2021-01-03 02:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 04e238becf187337ae27585a8eb50f1e SHA-1: 0bf009808982e1c4e6b5f0dfb4430d8a9d812deb SHA-256: df2b9ab917dc2e94d3852e713d07d4bac08c31db1c25a825670404addd23c2a0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to S3 buckets and other domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for further exploitation or credential harvesting.

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://trafffi.ru/aws?utm_term=informazioni+traffico+autostrada+del+brennero PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482399/normal_5fdfc604a46e5.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/6478151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f8700559ea23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5fc181f79f7b3.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://zuzoperelalame.weebly.com/uploads/1/3/2/6/132683259/8530628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5fe5c24ee3e4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fe2ab861923c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481509/normal_5fc313226d3b5.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/wamatasamegu/lufosupekotujiluzegiburi.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/android_bitmap_drawable.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/caterpillar_clothing_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/eas_advantedge_carb_control_shake_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/bgp_protocol_packet_format.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_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 5296 bytes
SHA-256: 68079e4337385af71b1a6153192006858adc35a5a72a944bb6b0ae55e302cf64
font_01_sfnt_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 11188 bytes
SHA-256: b1cd7f30a9a87cd7c94c28d3a147c8f3f4e5a40144187283bebe3272cf07555e

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