Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec2604d65261d5a…

MALICIOUS

PDF

138.4 KB Created: 2021-06-08 16:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6bae164a3684655ef3b9d57633e1c6e3 SHA-1: 951c6a28cc1a4ad728243a8712735f40f21c8916 SHA-256: 0ec2604d65261d5ad61d05fbea23d94b43a492a0d3317f99b4726def7ade07c1
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to attract traffic. The embedded URLs and the heuristic firings suggest a phishing or malware distribution attempt, masquerading as a download portal. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9791

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://cructi.ru/pbw?utm_term=download+garrys+mod+free+full+version+pc+%253B+50+%253B++%253B++%253B+Low+%253B+0 PDF link annotation
    • https://xerotopofuwega.weebly.com/uploads/1/3/1/4/131406930/zejaxozitor_tufikoxomav_fukakekumifow_dulejugogivu.pdfIn PDF document text
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/2dafc1a3.pdfIn PDF document text
    • https://nukarefu.weebly.com/uploads/1/3/4/1/134131348/jirapefi_fibamukuzetiw.pdfIn PDF document text
    • https://bexaxasoves.weebly.com/uploads/1/3/1/4/131438242/3d70def7f8f45.pdfIn PDF document text
    • https://liruviwogaralo.weebly.com/uploads/1/3/0/7/130776788/5878372.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/4723729.pdfIn PDF document text
    • https://setojeduvesile.weebly.com/uploads/1/3/4/5/134587971/momalubuvigup.pdfIn PDF document text
    • https://mivopolidenez.weebly.com/uploads/1/3/4/3/134349928/1279135.pdfIn PDF document text
    • https://nilitimuxuzadox.weebly.com/uploads/1/3/4/3/134320754/a422006a3d3bf08.pdfIn PDF document text
    • https://sopudediliwaweg.weebly.com/uploads/1/3/4/5/134587721/e89274ce48b.pdfIn PDF document text
    • https://bifimazetaxa.weebly.com/uploads/1/3/5/3/135326975/8805996.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/loralixesepuwa-razove-sodolijozu-julikekaloja.pdfIn PDF document text
    • https://bikekifo.weebly.com/uploads/1/3/5/3/135304891/silominamiwek_fexoxoxusop.pdfIn PDF document text
    • https://bawufavipefal.weebly.com/uploads/1/3/0/7/130740211/6781666.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0624d0-6f8c-4cb0-b245-a997ab9bfa0b/bekatutuxiroranenowekaf.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/1570599106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b7567b-6ae4-4107-baa7-b4ef9f124631/bexufanonomudizofiwejel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06917764-5bf1-4cc5-8806-991302a589dd/43801233670.pdfIn PDF document text
    • http://puxivir.pbworks.com/f/7048182130.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0001eab7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1EAB7 21476 bytes
SHA-256: 6494f218ae5343a0521a68671cc8714f06923ed6992ce862b73e6a6b598f84d0
font_00_sfnt_off00018599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18599 6176 bytes
SHA-256: b3ddf824ee458522235de0867620cad0c11358a358cc4a899c10d83a01e593a6
font_01_sfnt_off00019ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AE8 6100 bytes
SHA-256: 8fb6138caf5b366c69ee8c82c44d316562bf880deb97b6955fbe1c8a58193865
font_02_sfnt_off0001afcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFCF 1996 bytes
SHA-256: 175309d29c787bd73e2a5a4bd6e3bb40bb54b82440aa5bc3232f7afbd6522376
font_03_sfnt_off0001b956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B956 17260 bytes
SHA-256: 6a953b334c7491c8d9046c2ffee2cdc66132b5e64d3f164b83415153c6b24176
font_05_sfnt_off00020f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F5B 2792 bytes
SHA-256: a6d7b5d04f7cc253e910bc7dbf48565f71a2fa5efd6c63e23c209f98e4469a54

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