Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2d8b45fa4f9ece…

MALICIOUS

PDF

78.4 KB Created: 2021-06-01 02:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 997ffa72a5cd79769c6c507810957f74 SHA-1: 8a67c3ce70b3fa7697430916f8bdc776c5ba0f4d SHA-256: cf2d8b45fa4f9ece6059edec86ed46bf9a605889b1214bd1164f411122a11bdd
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, contains a query about changing Schlage keyless entry codes, which is likely a lure to direct users to malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://krisoc.ru/pbw?utm_term=how+do+i+change+the+code+on+my+schlage+keyless+entry PDF link annotation
    • https://puvedevedumu.weebly.com/uploads/1/3/1/4/131406841/botudijukoxamolimevu.pdfIn PDF document text
    • https://ralakugifobiw.weebly.com/uploads/1/3/4/5/134589758/nemipe.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/9630618.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/gemepolavubumat.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/forelirupowoga.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/pinotemuwinupux_poxulilub_fizupaxol.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/f9598f9ce.pdfIn PDF document text
    • https://sibanixo.weebly.com/uploads/1/3/1/3/131380297/pefajuludevex_derazesel.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/036ad9.pdfIn PDF document text
    • https://xawoveramexu.weebly.com/uploads/1/3/4/0/134095940/jewir.pdfIn PDF document text
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/duxawufi.pdfIn PDF document text
    • https://toxofeleziwogiz.weebly.com/uploads/1/3/1/4/131406173/zoxetulove.pdfIn PDF document text
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/4714893.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/531111.pdfIn PDF document text
    • https://wizemeleg.weebly.com/uploads/1/3/4/3/134307012/vixomemuwivodo_ravubelerage_dodijet.pdfIn PDF document text
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/xavevonidudilu_zapixibekogov_pobexilaxofu_zesekitibufug.pdfIn PDF document text
    • https://mepolelo.weebly.com/uploads/1/3/4/6/134626310/f792f43618.pdfIn PDF document text
    • https://fuduxudeki.weebly.com/uploads/1/3/4/6/134606049/jevarozoki.pdfIn PDF document text
    • https://gogafijunovox.weebly.com/uploads/1/3/4/3/134322332/3e5a0098a.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/jeporufola.pdfIn PDF document text
    • https://xulobefopit.weebly.com/uploads/1/3/4/3/134349373/1517978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144434307/74966503629.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144434709/dakog.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/f/download_film_teman_tapi_menikah_2_layarkaca21.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/nova_escola_de_linguas_maputo_mozambique.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_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 5572 bytes
SHA-256: faa03a9ba962a5e1859acd93c039988d33f6d75cfc6331be277483fbcb931357
font_01_sfnt_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 10972 bytes
SHA-256: ce97d9e5e69c4d8f009234d962201d544882fb67d2f103c7a9df6f5cd64c38ed

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