Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2acf13f250a69b8…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 05:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993cd27304d89748b0782a631af55eb7 SHA-1: 9779ef01012007e72b51075b749e5a6b6c1a45e6 SHA-256: d2acf13f250a69b858832aaccb17dc2d8401393e50bc700e7d2c285d5276cc5e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as search results for hacks and cheats, indicating a link farm designed to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs and the PDF structure itself are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://golowaki.ru/wix?keyword=my+singing+monsters+hack+apk+download+android
    • https://cdn.sqhk.co/bulelovuroga/cmNvvjf/best_funny_ringtones_for_android.pdf
    • https://cdn.sqhk.co/jelasusoved/id6jf6c/nomafov.pdf
    • http://limaxinsto.xyz/sierra_gamechanger_load_data_3081iww9.pdf
    • http://medgaj.com/97835695418suxy7.pdf
    • https://cdn.sqhk.co/demexadol/gj8uMPF/polemakopufetemuro.pdf
    • http://cardioactiveuficiale.site/musulajewejagakusdzfq7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_aeae2354fa444f4a9442169c82519446.pdf?index=true
    • http://pipozazil.rf.gd/46638747613.pdf
    • http://budobilososuw.rf.gd/8804419736.pdf
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_9c9372f8621f43c38281f6d1e72e3d6b.pdf?index=true
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_8553218f1e6c4dafa2d2c15ae08abe77.pdf?index=true
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_8176021bacb94f058ddc56e72d74e99f.pdf?index=true
    • http://zuvolape.epizy.com/burger_king_coupons_breakfast_2019.pdf
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_81ad188b7c394ff7b6847ba0ece0b085.pdf?index=true
    • https://368af19b-b9be-4417-8ea7-dfc4611f9fec.filesusr.com/ugd/abd4c0_69c3c830dfab43ceb1392435a0c938a7.pdf?index=true
    • http://xonowazibekaz.epizy.com/2018_yearly_calendar_template.pdf
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_df168e7bd0074071bf7f1358bfa93583.pdf?index=true
    • http://vutevesofu.rf.gd/secret_video_recorder_pro_apk_for_iphone.pdf
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_28bb8b52d4834f169cf6cbed3c17b5c4.pdf?index=true
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_002af1bbfda84452bc76b5fc8e2d431c.pdf?index=true
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_c9fe9bf3b2d340e3a6338bef9c4411fa.pdf?index=true
    • 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_off0000e8af.bin
c6da8e1a98f6ac7d4e6fc4693c524bc16244741e96788a48769212433c9ac072		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 5748 bytes
font_01_sfnt_off0000fc43.bin
47b860aa06517716207f736b8080d755827081a39b47302b5dfb859f7961eecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC43 10632 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.