Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec2c6cf70b019f7…

MALICIOUS

PDF

77.3 KB Created: 2021-03-30 08:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fce0fb539f656c8a2964c3fbc73729cf SHA-1: b5dbb38d3dab574d2f319286ecdb7e9f861984e1 SHA-256: 1ec2c6cf70b019f7befd5df309866b0d0d29f9a3fd9d2f5ef1f28fa551411ba2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL `https://dafemum.ru/award?keyword=astm+d638+pdf+download` suggests a phishing lure related to document downloads. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/award?keyword=astm+d638+pdf+download
    • https://besaxujujugolu.weebly.com/uploads/1/3/0/7/130739491/zaned.pdf
    • https://rujenamifib.weebly.com/uploads/1/3/4/6/134652207/9a365b55c60893a.pdf
    • http://vsspb.ru/vowifewefalaks04o.pdf
    • https://setejurisu.weebly.com/uploads/1/3/2/7/132740540/toluxoxinabatif.pdf
    • https://mefupawex.weebly.com/uploads/1/3/4/3/134317460/wogexut-xogigi.pdf
    • http://omshop.space/mimizujegatoladmergi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_118216fa11db4f7fbcffa5935ed0ddad.pdf?index=true
    • https://d1b6b380-f15b-462b-86b5-0b089ba7d90d.filesusr.com/ugd/f99a33_15c44fc6f1ff4ac9b7738333e5f52ebe.pdf?index=true
    • http://poresiz.epizy.com/36451279311.pdf
    • http://delonewafunedi.rf.gd/form_submit_radio_button_value.pdf
    • https://uploads.strikinglycdn.com/files/4204a47c-2fa9-4ef4-87a4-248b753b1380/mcgraw_hill_connect_organic_chemistry_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/5ac9ede1-d060-42cc-a322-ee574190d42e/wheres_waldo_shirt_amazon.pdf
    • http://megisaduvivegi.epizy.com/61532818330.pdf
    • http://nejajubuwuwo.rf.gd/amaravathi_film_hd_video_song.pdf
    • http://varupasasadutab.rf.gd/common_english_phrases_for_beginners.pdf
    • https://9462281c-6212-45c1-8f90-c4e3c363a226.filesusr.com/ugd/007d40_77857044c5ad4aa1aa3facfa4e33fbe6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/637fa76d-97bb-421d-87d0-5200f1222d40/givakebupuda.pdf
    • https://uploads.strikinglycdn.com/files/c3de152f-33f5-4abe-9874-de5e5dbae9be/18566279516.pdf
    • http://zuribetemeriguk.epizy.com/wondershare_editor.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_off0000ec35.bin
d6d889a7bd195ab184abff6debf068a50773aa1ebbfb6145af3f3b8237b5b04b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 5684 bytes
font_01_sfnt_off0000ff92.bin
c12ab90d3c4ff81c15729eee103f091f1bfcb38aa3460be0d93e45e8bafa04ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF92 11840 bytes