Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e148cbf367c5976…

MALICIOUS

PDF

156.0 KB Created: 2021-03-03 07:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 222af23f211c6050d25082cccf35531e SHA-1: 9014b073fbc81dc5661f5ae3d79a5410fc79b9e5 SHA-256: 0e148cbf367c5976eef1681712d1d641a99d614e05044d3992750ccb348d9ecf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9882

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://mezovuduw.ru/123?utm_term=design+of+masonry+structures+is+code PDF link annotation
    • http://kopavavabigi.66ghz.com/keto_bread_cookbook.pdfIn PDF document text
    • https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/luzebexajude-dozawobavo-ramokepizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd36a817e6f0.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/zidamipagug.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/samsung_xpress_c460fw_install_toner.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/down_to_the_river_to_pray_chords_piano.pdfIn PDF document text
    • https://vepidatebodosa.weebly.com/uploads/1/3/0/8/130874400/4a06ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_603c1f4a18d6b.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/wewopo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fdb591c1ca8f.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/zipugilatit-putopalawipexak.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/gigdHjb/photomania_photo_effects_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tupemovon.rf.gd/9096823318.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4FB 5292 bytes
SHA-256: 899a6407ebc798a4b2579127fbafcd75f647df98c801cf500937b05c1015d347
font_01_sfnt_off000206e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x206E5 12136 bytes
SHA-256: 960402113a4aa0582a210be15cc6ed4ca7c7b14e70872e62c56a82fe936cf512
font_02_sfnt_off00022f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F81 16072 bytes
SHA-256: 5daa2859ac1cba10c019d93b3654b7392607614b218f12f6681e5ae5f126ae4f
font_03_sfnt_off00024420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24420 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_04_sfnt_off000251e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x251E2 6080 bytes
SHA-256: ecef0e6781d879706158b22e370881614081156a6e55f6eaf1d793eeb63a985a

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