Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b29c46ee4df333c…

MALICIOUS

PDF

123.1 KB Created: 2021-01-17 13:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: aa00ae7b357097aa04c19705e64398bd SHA-1: 958a6e14230db6a58227a454acb9cb53c30488ad SHA-256: 6b29c46ee4df333c78949214d4aad264a7dc918c21453ed9c55feee5e23fc93d
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a redirector link and a link farm. The ML classifier and ClamAV also identified it as malicious. The embedded URLs suggest a phishing or scam campaign, likely using a large number of links to obscure the malicious intent and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/aws?utm_term=mathematical+reasoning+form+4+ppt In PDF document text
    • https://static.s123-cdn-static.com/uploads/4485161/normal_5ff612dd43768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5f99ef66ac941.pdfIn PDF document text
    • https://site-1191130.mozfiles.com/files/1191130/first_aid_kit_amazon__ca.pdfIn PDF document text
    • https://site-1174987.mozfiles.com/files/1174987/9164203159.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/5681973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f9b5c910f207.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/6877584.pdfIn PDF document text
    • http://zakofuta.66ghz.com/rubajo.pdfIn PDF document text
    • https://tivuzukabatabab.weebly.com/uploads/1/3/1/4/131405927/ee4f46b40.pdfIn PDF document text
    • https://site-1178710.mozfiles.com/files/1178710/lutalufomekezatu.pdfIn PDF document text
    • https://site-1166670.mozfiles.com/files/1166670/79460943116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485176/normal_5ff3401def892.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/gabrielle_bernstein_books.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/3561882100.pdfIn PDF document text
    • http://wasaxotudulolo.epizy.com/vans_era_sk8-_hi_stacked_platform_sneaker.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/22798123221.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/angry_birds_mod_apk.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000155c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C0 5788 bytes
SHA-256: db4fd9e89362907017b9c0f7b29e829aceccab9c330616e1b3fe6dafbf38044e
font_01_sfnt_off00016958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16958 3332 bytes
SHA-256: 268f37097665e38615b323b86f3925c14b9cee3d93435268726274cdf3d453e7
font_02_sfnt_off00017601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17601 5520 bytes
SHA-256: 05fa1d2f06c93ca5b13cb408ae2a025fc41cb05d68cdc46fff4a5546f0764c89
font_03_sfnt_off000188a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188A8 6296 bytes
SHA-256: 9f2406b17c9f70014ec8a203ff1edac811efe7f1f551e8ef4ca1043b711d6da4
font_04_sfnt_off0001991b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1991B 13588 bytes
SHA-256: 4447172ca78aceff3a764507419d5a4ca18c96efc1b26f9ab2d524e6b6ef6315
font_05_sfnt_off0001c6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6D5 16472 bytes
SHA-256: 7708c0e90b85261189eb48a21a97a5e7941dd1e8745ac1b152e226c80627cc80