Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed48147e6492a77…

MALICIOUS

PDF

77.6 KB Created: 2021-03-19 05:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c1f9e5e8caa68b28451eaae93f2683 SHA-1: 45b842789c3db68eadf7b8f77dceb3bbd02b4787 SHA-256: 4ed48147e6492a777ced38cded5af024544729338d871c507454e03a5d594f70
196 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicative of a link farm designed to distribute malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic suggests a deceptive lure, and the ML classifier strongly flags it as malicious. While no scripts were directly extracted, the PDF structure and numerous external links point towards an attempt to trick users into downloading further malware, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/123?utm_term=data+scientist+resume+sample+pdf
    • https://cdn.sqhk.co/suxevevagova/digggjb/max_5_my_wellness_coach.pdf
    • https://mejekuveko.weebly.com/uploads/1/3/5/3/135392268/7328915.pdf
    • https://bexavulurezil.weebly.com/uploads/1/3/0/7/130738929/bedefofetud-fofem.pdf
    • https://xokefazekuli.weebly.com/uploads/1/3/5/9/135992394/mewox.pdf
    • https://komidozikozapuf.weebly.com/uploads/1/3/1/4/131455883/xusidurosibez-vudolazune-joxoturusirepap-sekurufizibete.pdf
    • http://figimumagoko.mygamesonline.org/test_de_raven_resultados.pdf
    • https://kujakaxu.weebly.com/uploads/1/3/5/3/135347331/5074827.pdf
    • https://cdn.sqhk.co/lerutefo/jeHMkgj/31700021972.pdf
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/vagubuwuwi.pdf
    • http://kamikofonem.mygamesonline.org/wixamiwuloxevog.pdf
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdf
    • https://cdn.sqhk.co/petawelesup/hj4jghf/castle_kingdom_crush_in_strategy_game_free.pdf
    • https://cdn.sqhk.co/tonatozi/zNmqihe/nuxutowo.pdf
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/mijebojutub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/03aeb98f-60a3-4d1f-af8e-0f439eb35869/57163753438.pdf
    • https://uploads.strikinglycdn.com/files/1b1bdf9a-897c-4e9d-9d1b-de0919cc9ed3/verizon_mifi_6620l_antenna.pdf
    • https://uploads.strikinglycdn.com/files/c1075bec-d2cb-48ae-82b7-263ca635c273/how_to_tell_if_kangertech_evod_is_charging.pdf
    • https://uploads.strikinglycdn.com/files/7f086acb-082f-42c5-9579-02d667d8156b/dr_jekyll_and_mr_hyde_summary_of_chapter_9.pdf
    • https://uploads.strikinglycdn.com/files/e202fd8d-c158-4e34-acbf-0dc786a12d70/miller_bobcat_250_diesel_welder_generator.pdf
    • https://uploads.strikinglycdn.com/files/9a76cb76-da2c-4d40-bcc8-b56ba166c273/what_is_the_yellow_button_on_logitech_k400.pdf
    • https://uploads.strikinglycdn.com/files/461e8a91-8b80-4877-9633-02c96b0ac2ab/13273913482.pdf
    • https://uploads.strikinglycdn.com/files/6eced976-853c-40b8-a80c-88cbbb6731a9/11307899398.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f149.bin
ea911b5c1be69f4cbd56f3d588d6692f15bace64735c821f90a8e474c9939646		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 5300 bytes
font_01_sfnt_off0001033f.bin
84c7c08ad57d63377e89a550d6930bc826aece807328959114a0bf62b2ada20c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 11108 bytes

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