Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0cd53692458050…

MALICIOUS

PDF

66.1 KB Created: 2020-11-21 22:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d1682c5c9739ea2d85ac4148490b2264 SHA-1: 63c4ba740b1a2ca8c86e18955c32ca307ee31f00 SHA-256: 9d0cd53692458050e611b672e9c31280c7f1c7a98c6f4c6b930dc8fc21aee997
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

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
  • 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.
  • 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=the+fifth+agreement+quotes In PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/4d560.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/pekedure_lesodakoxasona_jimuvozevedun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_5f9b3a52f33c5.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/xanunafojuloki/zulubefabejat.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/disable_message_blocking_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1c1501-da8e-4f98-9ede-9aed75ebe565/tepexusujafofubujixe.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/yuki_japanese_restaurant_portland.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/94033684800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb44a201-ea5d-46f6-81ba-12782abd3b00/zepenunot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135a0a38-20c1-485f-bc17-775e0e3fd6ee/wufijuriwix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c1bd43-5cf3-461f-a962-0e1735455afc/22844591637.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_off0000c3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CC 5224 bytes
SHA-256: cc8ce352936e222d600fc30aedd8eed17458a3506c833cb1707698caf8721c32
font_01_sfnt_off0000d569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD569 11312 bytes
SHA-256: 4fd7306fe98eee4e35b821a176c01dce9d1ae79519ad9e93daf5945cb1a57501