Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc10fdd1a8d03958…

MALICIOUS

PDF

88.4 KB Created: 2021-05-20 00:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b29e92f8e54d36218dd5dc0c4c8556b9 SHA-1: 2a9664e0f6dedc0251bab80922774a126dcb00e5 SHA-256: dc10fdd1a8d03958e91e74b8115abc5ddb96e80004aabde5bb12dc76f3ef0fdb
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure for 'Autocad 2020 keygen generator' and redirects to the URL https://xajibur.ru/strik?utm_term=autocad+2020+keygen+generator. This URL is flagged as an SEO redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/strik?utm_term=autocad+2020+keygen+generator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415944/normal_5fcc175be39a8.pdfIn PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/gegiruxeve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375204/normal_5ffd19464b973.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/rezuvoxumivan.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/2287881.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/dd485b2e4903.pdfIn PDF document text
    • https://tiriwubesunadew.weebly.com/uploads/1/3/0/7/130739346/2dcd746b.pdfIn PDF document text
    • https://lumigoxodavi.weebly.com/uploads/1/3/1/6/131606620/1e171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_5fd03cb40354f.pdfIn PDF document text
    • https://pefemodadiz.weebly.com/uploads/1/3/4/5/134520562/32226.pdfIn PDF document text
    • https://taxesewisozigif.weebly.com/uploads/1/3/5/3/135394589/7943037.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/zikeko/coreldraw_2019_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/xolobutu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/coachmen_rv_owners_guide_app.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/xarewofu.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/42916606307.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/dusorepulusapowo.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/who_is_lady_zamar_husband.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 9268 bytes
SHA-256: 2eb517e87d3b8f525d48ab7c5281718a56f86feb036df767375fd6d3c0c534a3
font_01_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 5324 bytes
SHA-256: f64d941891711250a113fbee48f4a59bfa660a0361812fa77c2b878af3e72116
font_02_sfnt_off00011856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11856 11656 bytes
SHA-256: 86da09120ee5e1d53749e09cdbab71f56bfc2eb110949c5fd7388e668ce42a49
font_03_sfnt_off00013ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA4 16184 bytes
SHA-256: 0aaac2e21df94829f1570b9c4dd9815726b1a56d9f79600c263a42643892fce8

Open this report in the interactive analyzer, or submit your own file for analysis.