Malicious PDF — malware analysis report

Static analysis result for SHA-256 774c296a1776859a…

MALICIOUS

PDF

74.8 KB Created: 2021-05-16 05:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 612a231a48d4b187b40c313bc7450cde SHA-1: efeafe96569ae0a7703ea3bfe22db33cf8c62b69 SHA-256: 774c296a1776859a9ef177b626c3ed46b689d0ae1dbc32a50a6b61a5d71a73f4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. The document contains a lure related to mental health rehabilitation, which is a common tactic for phishing campaigns. The embedded URL `https://seumenha.ru/strik?utm_term=mental+health+rehabilitation+western+australia` is likely used to redirect the user to a malicious site for further exploitation or credential harvesting.

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
  • PHP webshell / backdoor source high WEBSHELL_PHP
    The file contains PHP server-side code with the signature of a webshell/backdoor (request input fed to a command/code-exec sink). A webshell takes attacker input from an HTTP request and runs commands/code on the server. Flagged as a malicious hacktool artifact even when carried inside a document or archive — the code does not execute from the carrier, but the file is a webshell.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=mental+health+rehabilitation+western+australia PDF link annotation
    • http://xogunajeraxuda.mywebcommunity.org/auditing_accounting.pdfIn PDF document text
    • http://zivufomureko.22web.org/behavior_clip_chart.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/suwowezajib.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/is_it_rude_to_give_away_a_gift.pdfIn PDF document text
    • http://loberas.22web.org/47164733446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivekogifix.epizy.com/lezorupekumi.pdfIn PDF document text
    • http://bexexakik.myartsonline.com/xowejunilenonere.pdfIn PDF document text
    • http://gisipusizen.rf.gd/53238373255.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/34297818685.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/att_zte_z222_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/android_okhttp_post_example.pdfIn PDF document text
    • http://kibululugavi.epizy.com/22965493626.pdfIn PDF document text
    • http://ganusigesu.rf.gd/quotation_marks_for_titles_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/mitologia_griega_dioses_artemisa.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/titanewupizevevimeje.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/toyota_camry_seat_covers_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/41247340066.pdfIn PDF document text
    • http://faberaladaruz.epizy.com/tigepazulikal.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 5008 bytes
SHA-256: a6c5c0ae97bb4480929edef0cfee6f5750229adf89ad0843f61d7d5d060aa641
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 10232 bytes
SHA-256: a276f5d9697d81c69afec68ed0206feb89e460003dcc72884657982802242d06

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