Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8967aae627216e…

MALICIOUS

PDF

191.9 KB Created: 2021-03-13 22:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: bc3b482c52bd93bcea277741d5ffd330 SHA-1: 085507293aeda417161ce2b72f6de4243e0ea903 SHA-256: ae8967aae627216e559fafc681cbf91fe79c766f9f92e6bde9c407ddc1514b0d
126 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 phishing or trojan threat. It contains numerous external URIs, with a primary suspicious URL being https://druttle.ru/award?keyword=panchatantra+short+stories+in+telugu+pdf+free+download, suggesting a lure for users searching for specific content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports the malicious intent by identifying the PDF as a link farm hosted on disposable domains, designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://druttle.ru/award?keyword=panchatantra+short+stories+in+telugu+pdf+free+download PDF link annotation
    • https://zawuziwoju.weebly.com/uploads/1/3/1/6/131636930/211500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_5fdc2771629e1.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/gobesijis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5ff92652b0917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_60268de787bda.pdfIn PDF document text
    • https://fenatinuzari.weebly.com/uploads/1/3/5/3/135314561/putupexewebop_melesavubag.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/92284275341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5ffcc5ccdb123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_601711d3ba943.pdfIn PDF document text
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/virefuvafibaropa.pdfIn PDF document text
    • https://domilejoxu.weebly.com/uploads/1/3/4/5/134529458/koveferikesodi-turufanusomi.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/fusedotonumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416514/normal_5ff85ce16c8cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5fc9f67e48dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6022bcaaba4f0.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/libugufafurezezurozi.pdfIn PDF document text
    • https://valazasabo.weebly.com/uploads/1/3/1/3/131398294/vimidimodokogadeduva.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/bissell_powerforce_bagless_canister_vacuum_cleaner_specs.pdfIn PDF document text
    • https://juvivufoli.weebly.com/uploads/1/3/5/3/135325295/5915ee81517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488558/normal_5ff6946c47c8e.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://s3.amazonaws.com/wujodibu/fedex_photo_printing_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/ncert_chemistry_class_11_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/arterial_line_waveform_aortic_stenosis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C5D 5508 bytes
SHA-256: 0f3446fd438043b1000c42c259b9116b8f9958a8e6daa721e28b2981c1f1d7d1
font_01_sfnt_off00023f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F23 82212 bytes
SHA-256: 4c79d75305141fc8bb2dfc3cffa244d15b454303a810666ffbf5d10170f04005
font_02_sfnt_off0002cda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDA9 10440 bytes
SHA-256: ed2986cb798fde08d458d37d735cda27d55e8313a1ece8f5ef6dd044c83f8a3e