Malicious PDF — malware analysis report

Static analysis result for SHA-256 9629cb33256ae353…

MALICIOUS

PDF

66.1 KB Created: 2020-11-19 06:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd5071f8e1f4abd24c30512e16a76a5 SHA-1: 7afa0d83c224a590e78dc64a172518a0e18a3f1b SHA-256: 9629cb33256ae353820ce80093c61d7929f2b850fc2ad667ba6758f49a1e039c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The presence of numerous external links, including one pointing to a known malicious redirector, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to compromised sites.

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://ggtraff.ru/123?utm_term=pictures+of+zombies+2+cast
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/6781803.pdf
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/gosifigodasawi-dizowuxu-dazorodeviv-bulapivuzuwile.pdf
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/zuxofomuvu.pdf
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f9765f75a7cc.pdf
    • https://ragikigoludu.weebly.com/uploads/1/3/4/8/134849848/gosezi_zulolulom.pdf
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f878a42a57aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusolefosex/31655127773.pdf
    • https://uploads.strikinglycdn.com/files/5ed4da29-c94e-4183-8694-d7252800e8c3/kuberu.pdf
    • https://s3.amazonaws.com/bulozor/android_civilization_building_games.pdf
    • https://s3.amazonaws.com/tugumeb/toxegeruso.pdf
    • https://s3.amazonaws.com/xukonakefules/26080354099.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_off0000c797.bin
191c1f1357237d0def44b81f1f1f9e7f289e71cd263d572784f3b34ad7aea80c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC797 5316 bytes
font_01_sfnt_off0000d99e.bin
30e1da4fbda8a556ba9d144c711503af3b7b849ca31f6e207452102c930702df
pdf-font-stream PDF embedded font (sfnt) at offset 0xD99E 10200 bytes