Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eaf4ed7702d56b7…

MALICIOUS

PDF

77.4 KB Created: 2021-05-23 06:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0303fce7fb11e5cee7d7c99d21e7ea6d SHA-1: 4966cb8713fcc25a0a95ba513b9171edec9168f5 SHA-256: 0eaf4ed7702d56b79aab0df0bf9118da873983c435f1ebfc8da0d344560edcd0
186 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. One of the primary URLs, 'https://nipisod.ru/wb?keyword=lakshmi%20hrudaya%20stotram%20benefits', suggests a lure related to spiritual benefits, likely to attract unsuspecting users. The presence of numerous external links points towards an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wb?keyword=lakshmi%20hrudaya%20stotram%20benefits PDF link annotation
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/2f84557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_6064340454a93.pdfIn PDF document text
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/gekubebijigiver.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449769/normal_5fe1d317cbdb4.pdfIn PDF document text
    • https://fakosizok.weebly.com/uploads/1/3/0/8/130813800/1123974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_6010521a41ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_6056e031c0158.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/8cb063f0a0e5adb.pdfIn PDF document text
    • https://rozelofesewezu.weebly.com/uploads/1/3/4/0/134040375/8960835.pdfIn PDF document text
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/2085730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_606255a0184a0.pdfIn PDF document text
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/3346212.pdfIn PDF document text
    • https://doxuvufunufake.weebly.com/uploads/1/3/0/8/130874670/noduwisajetixusidud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_6027b49ec3edf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_60391f58659c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1ba2a8-6d12-42a4-90e8-a0d02d584dd7/robert_greene_mastery_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7e4814-f922-441f-b4db-76dbdbb718ff/50348470532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5914ab1-2f95-4e3d-bc89-ee6abb318bec/lista_de_cualidades_de_una_persona_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a7581d-cd6f-4834-99d3-c30dbd83a02e/grade_10_physical_science_textbooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f99d37-b0a9-47ef-b80a-c90316f0df7d/star_citizen_gameplay_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6abf3c-91f9-406d-9416-d58260c3e91f/selenium_webdriver_with_python_from_scratch__frameworks_coupon.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_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 5364 bytes
SHA-256: 5e8047965cbebf94b9bc24f0b5b728aec1b8b091dbe6bccd8bafd7601e4d53d9
font_01_sfnt_off0001021a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021A 10788 bytes
SHA-256: e68d0da3504698143e8a6da83ce16b097381667192b4e275465771ed6fd86ced