Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a1ac0615938c00…

MALICIOUS

PDF

96.8 KB Created: 2021-03-20 02:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c30f498cac63a9e2c768b7b294585a64 SHA-1: 97e5f1f319d9b09d92e786d99e927e5feb7f1c3f SHA-256: 60a1ac0615938c00e633d6b9433a8b7fd54d11a7be0ba823d9576516ae267395
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://resalured.ru/strik?utm_term=what%2527s+a+1003+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459483/normal_5feb6b79924b3.pdfIn PDF document text
    • http://paselon.getenjoyment.net/xazexewibesupixidolasog.pdfIn PDF document text
    • https://fuzujaloxoz.weebly.com/uploads/1/3/4/6/134684853/sadojutikafeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_601798e7244d8.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/jigimijoroso.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/43394070908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_60367e46a08ed.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/regebal.pdfIn PDF document text
    • https://lopatitegadusi.weebly.com/uploads/1/3/5/3/135311006/wavegafu_bugubobegorarob_xitometebone_limeritetuzi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5fcd147e59514.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/52329913445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_5fe7bbfb3dcfb.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/gisujubolidine/pgl3-_basic_luciferase_reporter_vector.pdfIn PDF document text
    • http://fizatagaregig.rf.gd/6674645039.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/51691789294.pdfIn PDF document text
    • http://nupatugo.epizy.com/76431925354.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/64313304507.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/22327114908.pdfIn PDF document text
    • http://nidalufexif.epizy.com/how_long_does_it_take_to_cook_a_pork_loin_in_a_pressure_cooker.pdfIn PDF document text
    • http://fizinesunav.rf.gd/b._c._a_syllabus.pdfIn PDF document text
    • http://befabeme.epizy.com/rakefajax.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/acrobat_reader_free_old_version.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12445 5380 bytes
SHA-256: 31f7f39edc5b361061b13f290bf5cc0c1e438df1ea5295982ca50deb0ddfc005
font_01_sfnt_off0001367b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367B 12284 bytes
SHA-256: 324564574a9d5cd4108ab1e69e160e0bb04a10e252cd7cefcf8883da8f6ab732
font_02_sfnt_off00016066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16066 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3