Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff0dfeb3cac2fbd…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 12:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9aecaefdb5ce247e2621d4e399e1b97b SHA-1: b5954a6eac97079cca3791bb1897d436433a49ac SHA-256: 9ff0dfeb3cac2fbd96af929fc9839c43c0838786c5449fe0d10a67cac2725f74
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as search results for products like 'Pampered Chef rice cooker brown rice'. The primary URL, https://lozipotod.ru/wix?keyword=pampered+chef+rice+cooker+brown+rice, is identified as an SEO redirector, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/wix?keyword=pampered+chef+rice+cooker+brown+rice PDF link annotation
    • http://fofumumitem.medianewsonline.com/99608153131.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/geVjcDT/nujowawivoraki.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/ehhEQha/minecraft_servers_down.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
    • https://s3.amazonaws.com/jupevuxirapi/chrome_launcher_addon.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_a9bc9db520774f46baa29946340bbd26.pdf?index=trueIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_66a9e18ad44d45ecb57b119a51943b3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/24581631729.pdfIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_420d5813361146c98776175251c5dee7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/free_web_templates_for_photographers.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_496c55d7a74b42dbb13ea39f15b56227.pdf?index=trueIn PDF document text
    • http://nofolimuri.myartsonline.com/arun_sharma_data_interpretation_latest_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/how_much_does_a_small_plastic_baggie_weigh.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/bularofoji.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/jimawagepa.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/cisco_catalyst_2960_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/coaster_size_template.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/83371736180.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/ferojugalezaz.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/542264332.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/vetigegipoxaketi.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/kagasulasukifitajabib.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/54583372363.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_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 5192 bytes
SHA-256: cec4f0ad00bcc93d94bfbfb455c5a58e867f78ebf44e1cc10e68f34c3ab55ff3
font_01_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 10920 bytes
SHA-256: fc2f17638091b4f5d87e418463787ab341068c7591a4576d8f9bb07da514fa78
font_02_sfnt_off000120f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c