Malicious PDF — malware analysis report

Static analysis result for SHA-256 6094410e81ce13ee…

MALICIOUS

PDF

74.5 KB Created: 2021-03-16 04:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 866764940ef9b798a5ff6ffe5eaf13b5 SHA-1: 5a237511186bc489134a63c4652372daf4cad52e SHA-256: 6094410e81ce13eeb8e9cb5c2e03e1214c9853c8e2fd2c663eef576ba03ff3a6
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs under the guise of a "Saflok program manual" and related topics. The presence of multiple external links, some on disposable hosting, suggests an attempt to drive traffic for SEO manipulation or to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/wix?keyword=saflok+program+manual PDF link annotation
    • http://giwitap.getenjoyment.net/79356459849.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/42622868479x76nu.pdfIn PDF document text
    • http://bestita.space/jisuzepupolegoxipigge0sn.pdfIn PDF document text
    • http://max-lifting.store/sinavox4rcef.pdfIn PDF document text
    • http://idealslim-ordina.site/3525481466tq0dc.pdfIn PDF document text
    • http://pubguckazan.com/krld_1080_traffic_report4c2cv.pdfIn PDF document text
    • http://vittorguxx.site/deltran_battery_tender_jr_6_volt7xkv5.pdfIn PDF document text
    • http://esclick.pro/the_iron_king_maurice_druon_read_online2q9er.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_602167402c1f4b64b7e9f732822f1e42.pdf?index=trueIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_4a57314bad2649ccb9405f7e476fc676.pdf?index=trueIn PDF document text
    • http://jelunegizubu.atwebpages.com/pumadojolavob.pdfIn PDF document text
    • http://fadudenomo.onlinewebshop.net/what_is_the_meaning_of_a_narrative_paragraph.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_d0c2bea159e54312862544e1fba00c3b.pdf?index=trueIn PDF document text
    • http://piwakitidi.onlinewebshop.net/xuxodogakemofudiwuso.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_3d48579a2ca64c95930a9872ff89d5c6.pdf?index=trueIn PDF document text
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_9006dba95bfb44b8936bfc9b0e47491c.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_fbce1718350442578abeab7ade658b23.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_800af6d1281b4f6483a306e31f5727c0.pdf?index=trueIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/peace_offering_ideas.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/vibapupogewevugewebo.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_4cef1944914b4d10af2aa81bea116e1e.pdf?index=trueIn 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_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 5212 bytes
SHA-256: 0540c929a3696c64920b0231f6be80ded2deeec4b0eec0831c5ea97c9508bcad
font_01_sfnt_off0000f6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 11048 bytes
SHA-256: 7bee33c4d6712bf745c5836942f2e71d1d321c3de3af921beb16c644190a4a3e