Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c1bdf6a212964f…

MALICIOUS

PDF

60.5 KB Created: 2020-12-23 15:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 34e2072279a996983db1f2329074e0d1 SHA-1: b5cae382c2e1177eaff43026ad4294118ef52ba9 SHA-256: 49c1bdf6a212964f8db5d267d0c41bbdbff104ad400c62c48554c24266a7ca19
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, indicating a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/aws?utm_term=miya+bhai++mp4+video In PDF document text
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/9557666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5fd36af88c5ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5fbbb4ae2aa61.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/9900545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5fab12a127e11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5fdeaea87177e.pdfIn PDF document text
    • https://vuximugividus.weebly.com/uploads/1/3/4/7/134718293/9434457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5fdd3e4c3199f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450336/normal_5fdbdc60763fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379726/normal_5fcbd4de1cc3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_5fab6892d748c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_5f99e5faf3e7c.pdfIn PDF document text
    • https://suxifobafip.weebly.com/uploads/1/3/4/3/134370270/zebatejukefa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d966d7-1e20-4c2e-ad54-20d248861d9f/the_witcher_3_redania27_s_most_wanted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f098af0-8f19-4f4f-a6db-ad41f2c1ac9b/guide_to_getting_it_on_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7b7e58-f96a-4468-9698-984071f0de55/army_blc_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca0804b-b747-4881-9a54-0d6e4e7d5540/14472905784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a88f7f-1159-482b-b132-88b461070e74/appvn_pro_apk_latest_version_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ba0278-f6fb-4c9b-a4cc-e7e8131e32d6/walisiw.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_off0000b243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB243 5288 bytes
SHA-256: 50c648b1981959ecde800f6f4964a01ee1f53d937018c657b5bf8e1e0d69f05d
font_01_sfnt_off0000c434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC434 9636 bytes
SHA-256: 7c2b6ce7e5040b01b01c43353d92de8ae2cd473de1e7d235cff3bf501060bd27

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