Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acb4f8e7adfbabc…

MALICIOUS

PDF

114.5 KB Created: 2021-03-20 09:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6d489461582af2f5a46c80d31775289 SHA-1: 7ad829391f552d222e06e484d1a10648512ef5ac SHA-256: 0acb4f8e7adfbabcfd65be656a606bfdcfae5149fe7f26f34ff28bf4a4100873
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, likely for phishing or malware distribution. The presence of a 'Password-protected archive handoff' heuristic suggests a common tactic to bypass gateway security by encrypting the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/award?keyword=accidental+superpower+pdf
    • https://cdn.sqhk.co/gatidixon/iicpTr0/bikozemajofekuzopivudim.pdf
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5fec97354c13a.pdf
    • https://static.s123-cdn-static.com/uploads/4367286/normal_5ffec4a7ce5f6.pdf
    • https://donimafu.weebly.com/uploads/1/3/5/3/135395233/1446845.pdf
    • https://pufoxufuzevelo.weebly.com/uploads/1/3/4/4/134486621/zigigoruvozas_goterifoxijugur_delabumebubiju.pdf
    • https://cdn-cms.f-static.net/uploads/4423166/normal_6010d588c52df.pdf
    • https://cdn.sqhk.co/jugomuzuteb/HidkC1S/modhub._us_farming_simulator_2015.pdf
    • https://bafiredevidif.weebly.com/uploads/1/3/1/3/131384403/suzanet.pdf
    • https://cdn.sqhk.co/rorazelesu/ejcge8n/19293421869.pdf
    • https://cdn.sqhk.co/lukavago/cggKxEZ/sas_statistical_software.pdf
    • https://cdn.sqhk.co/dobexesi/zieoPhc/recarga_rapida_lycamobile.pdf
    • https://cdn.sqhk.co/gibewuzavi/mEjopox/70713100431.pdf
    • https://cdn.sqhk.co/birenejar/ggiiY4j/eat_up_all_the_food.pdf
    • https://cdn.sqhk.co/xekejegixawo/igiaheU/the_avengers_destroyers_hack.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87de4614-7c6c-49d4-91ae-65690b661cd8/10086119330.pdf
    • https://uploads.strikinglycdn.com/files/a870a767-c78c-4bef-bebf-21674fbc2584/lufigunukavamu.pdf
    • https://uploads.strikinglycdn.com/files/daaa8cbc-c2f7-44c2-9993-04aef16201a5/ergobaby_omni_360.pdf
    • https://uploads.strikinglycdn.com/files/d786ec47-acd0-4f33-b145-53750992c719/flowers_for_algernon_movie_actors.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/a36cbc07-f849-41c7-8359-43fec0223d21/88083724696.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_off00017ca4.bin
bcbfc1289c16850a5339bb2cb2efc46ca9beb26df7e7a659723d91a61b88a51d
pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA4 5228 bytes
font_01_sfnt_off00018e90.bin
1f28f39ab78b9acee96d1150c94414d8a1b40f63866886bf992ce15462225b02
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E90 15024 bytes