Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48cd229f096c78d…

MALICIOUS

PDF

80.7 KB Created: 2021-02-19 01:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8942c8d22557c717178e17787ff0b70c SHA-1: 9596c91ddcfdb5133af17d26ae5cfcad8e821150 SHA-256: d48cd229f096c78d2c94a1f094fbc259505407444ca5eb582c2f0234e6e774f2
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=governor+ratcliffe+quotes PDF link annotation
    • http://igonlinesupport.com/sifokogvzki.pdfIn PDF document text
    • http://twirlini.com/duzunelatiwudumqziuh.pdfIn PDF document text
    • http://itwow.info/13195056267ojrob.pdfIn PDF document text
    • http://com-signto6.xyz/positidibinovenigolizoju2nw4w.pdfIn PDF document text
    • http://topdouche.xyz/avengers_3_trailer_free_sabwap._com8aia4.pdfIn PDF document text
    • http://indohealth365.online/11450982792i8f9m.pdfIn PDF document text
    • http://vamepabiresoriw.22web.org/moxudujadetinim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493920/normal_5ffd6e5963728.pdfIn PDF document text
    • http://mimalixigew.iblogger.org/cleric_pathfinder_character_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5fd1ab179ec2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5fedfcc698629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_6014d4f1e90c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosawef/capablanca_my_chess_career.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/bk_precision_8601_manual.pdfIn PDF document text
    • http://mujujum.epizy.com/the_bloody_chamber_the_werewolf.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_off0001011f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 5092 bytes
SHA-256: e8093d4a32de95866f5cd4d11ba6beba4fabaa2da56d73cbbd3b4328c1d76625
font_01_sfnt_off00011293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 10240 bytes
SHA-256: fbdc101ae85cbf863a98da56e1403050318c8432938ede0ec6af4ddd6020bf26

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