Malicious PDF — malware analysis report

Static analysis result for SHA-256 975ad418949231b1…

MALICIOUS

PDF

78.3 KB Created: 2021-03-21 03:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d068ae32a5fe9e9fc4935927fcf0e77a SHA-1: d9f1fb65548ebbbba6ee3cc440d8eae099685ab7 SHA-256: 975ad418949231b19302b0415bb3370534ad708a72e6161b900079359997c869
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/award?keyword=b%25C3%25BCrgschaft+pdf+muster PDF link annotation
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/lofajuzoranex.pdfIn PDF document text
    • http://obuv-kozha.ru/lixipekewininw54t.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/petusiwirixib.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/lunufexixosoj.pdfIn PDF document text
    • http://firstflirts.site/707056180324nhvi.pdfIn PDF document text
    • https://gezedasi.weebly.com/uploads/1/3/1/3/131378850/2460618.pdfIn PDF document text
    • https://sovawetozinunur.weebly.com/uploads/1/3/1/4/131407226/6306078.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/pozup.pdfIn PDF document text
    • https://disabamabasato.weebly.com/uploads/1/3/1/0/131070072/2732445.pdfIn PDF document text
    • https://levufiturosotin.weebly.com/uploads/1/3/4/4/134466711/e42812202.pdfIn PDF document text
    • http://giveaway2020.info/gewixajetipojulilaeq224.pdfIn PDF document text
    • http://vabuxobetarewo.22web.org/nonixesufagepasomafikej.pdfIn PDF document text
    • http://tegor.xyz/952071072065uk1g.pdfIn PDF document text
    • http://hytri.com/624375026144y0bt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_46df0756b19247c49dce87bffe0eaab0.pdf?index=trueIn PDF document text
    • http://nofadokar.rf.gd/66565184997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48695a5b-e738-4a54-bb16-4185b78127d6/the_postman_always_rings_twice_movie_1946.pdfIn PDF document text
    • http://vuvobulasuxes.epizy.com/new_alien_dance_songs.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_a9af7ce9d64d4dfdaca356e5d4c2fc20.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02064168-1f1a-41c9-a6c4-04f2a72ff9ea/tozugewalowanukakitisu.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_b718f63320a5471e89d34ee5f73c10c9.pdf?index=trueIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_b29df6c1fb674e3cb77deb682814ab37.pdf?index=trueIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_d5066014e07041d4bd180419202d6541.pdf?index=trueIn PDF document text
    • http://duvufewitopemaw.rf.gd/railway_empire_signals_guide.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_off0000ef7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7D 5704 bytes
SHA-256: ce1940fe52b8fff58851973254a17f15f74ea4d72490abb5441479c4445f76f5
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 12020 bytes
SHA-256: 4a2d9cebfd020d3e6b66ddf05d75f2d1dbef43c3e0823d4712c12a312539a180