Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b05a16b9d75dbd2…

MALICIOUS

PDF

67.4 KB Created: 2020-11-11 05:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eb53e3dc315b63c2d46d27103c43af5 SHA-1: 2ea6e9f674792e3282c7664e8b656a8f4f8891b6 SHA-256: 6b05a16b9d75dbd212d0e976541fc1312ca36009cf7b90554ca154b32a54ee5d
214 Risk Score

Malware Insights

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

The PDF contains a link disguised as a movie download lure, which redirects to known malicious infrastructure. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, strongly suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?keyword=download+new+movies+free+online
    • https://cdn-cms.f-static.net/uploads/4387417/normal_5f8dad48946bb.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/811c5bce137c.pdf
    • https://sasenepekevob.weebly.com/uploads/1/3/4/2/134266747/011e96b4.pdf
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f8aa9d1e34e7.pdf
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/2fedab7ca.pdf
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8ce22f38e49.pdf
    • https://cdn-cms.f-static.net/uploads/4406497/normal_5fa197aa47762.pdf
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f92dd15462f6.pdf
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/madetokenadevezaga.pdf
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f922aafd7221.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/podawakumepewez/xejuwakufixufuja.pdf
    • https://s3.amazonaws.com/sevoga/sorellis_pizza_phone.pdf
    • https://s3.amazonaws.com/takebemanijewok/roxy_theater_camarillo_discounts.pdf
    • https://s3.amazonaws.com/lanorolowu/31800136031.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca98.bin
96eacf5dc9806dc4c5d8cdf77f5da28d8efc0c1d2c04eb4a77fc7d4d80e6e5d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA98 5204 bytes
font_01_sfnt_off0000dc51.bin
3715966c8e90f635eb432a835c020c6df0c1c7a0523c54988329fba10ce36e21
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 10644 bytes