Malicious PDF — malware analysis report

Static analysis result for SHA-256 1232b21ede777f80…

MALICIOUS

PDF

74.5 KB Created: 2021-06-11 09:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6b1b6e067b27009ade20ba424d1823f2 SHA-1: c9386c68fafc645aae9824ce047a1f5802c264ce SHA-256: 1232b21ede777f8030ef7aa2a6c532a40e2c1d1d5a0429b81b79203f3b1817b2
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is also detected by ClamAV as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary lure appears to be offering free PowerPoint slide designs, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://allytemp.ru/pbw?utm_term=powerpoint+slide+design+free+download PDF link annotation
    • https://detifurotuso.weebly.com/uploads/1/3/5/3/135321595/f4313a.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/dijudinur.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/9bfda3aac2.pdfIn PDF document text
    • https://puviguwa.weebly.com/uploads/1/3/0/7/130776677/1067490.pdfIn PDF document text
    • https://japugaze.weebly.com/uploads/1/3/5/2/135295186/tumuminasaja_zozuxakuxejana_rutuzojunetamop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_605457a7967b6.pdfIn PDF document text
    • https://tubonizuruzoxuk.weebly.com/uploads/1/3/0/9/130969435/bujiw.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4446038/normal_60b3c977f34b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_601f0e92d5aba.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/gabufosupegum-raxonulaxorig-penavufitiwale.pdfIn PDF document text
    • https://tataberoxem.weebly.com/uploads/1/3/0/8/130874397/sesaxegimorejukexip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_60ba3bfec1e78.pdfIn PDF document text
    • https://nunofisodopuw.weebly.com/uploads/1/3/4/2/134234763/tarenopepoju_lasifeki_nadag.pdfIn PDF document text
    • https://baxegirugono.weebly.com/uploads/1/3/5/3/135319521/vosawivitamis-wugubasifax-subafagujom-gelis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_603597a8129ae.pdfIn PDF document text
    • https://zanelonovubut.weebly.com/uploads/1/3/4/3/134315015/sagilupi_kimud_mosajazifiguf_fokupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogogivu.pbworks.com/w/file/fetch/145051770/woxiposedeso.pdfIn PDF document text
    • http://sovafiben.pbworks.com/f/bosoxujirudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76568a4e-ad4d-4a78-9fd1-57f628303488/cheap_xbox_one_wireless_controller_with_headphone_jack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43379e6e-8460-43d5-8f39-14c2e65f5175/70446388972.pdfIn PDF document text
    • http://bujolajoxek.pbworks.com/w/file/fetch/144823281/virasikipos.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/f/far_cry_4_apk__obb_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79856762-87a5-4f9b-8d9e-eb0c56db0b77/jokigobojuxugisuvalovogix.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/w/file/fetch/144500334/53062946666.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_off0000e543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE543 5300 bytes
SHA-256: 3f22914e38727cd827e94277001038a02b3990af38c0082b6e26767f18cc2a7e
font_01_sfnt_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 10876 bytes
SHA-256: 33abe73dd30bd64a34fd7bdf18324e20538578d7adf4fb9ed09ace400e389ce5