Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1b8574751c9eee…

MALICIOUS

PDF

76.4 KB Created: 2021-09-19 06:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a56999d8b7f57f7f5a80e5b9d006c13 SHA-1: 1864bcb028f3cffc89671bb00a571e3bac0685d2 SHA-256: 1a1b8574751c9eeecac51563f7ba832bb1d16308c7b327334484b9081a5da7dd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it contains a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. Multiple embedded URLs point to potentially malicious PDF files, indicating a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://cargologicru.com/sadm_files/tovuvamal.pdf In PDF document text
    • http://headlinesdinerla.com/uploads/files/zukoxediso.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/vowojeligakitabu.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/sokuwotejivulezogob.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/18238964563.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/2511637717.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/tirokujifa.pdfIn PDF document text
    • http://podushka.by/files/files/53698534981.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/1549359993.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/kegitozoto.pdfIn PDF document text
    • https://lecachet.fr/docs/files/gapovasokugojux.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1c832dace05837686db44a41df9101f9/67155561709.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/14229877158.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/92997761397.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/tuwagamisajir.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/66633696046.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/luwikaniririborupa.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631036014.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/18115332513.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/pezesemezivisidako.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0f5295125---1053891387.pdfIn PDF document text
    • http://selidbe-beograd.info/files/73274005729.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/lanox.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/17009858961.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/zelufonesabuzabijazevu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+change+my+phone+lock+screen+passwordPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC499 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 11152 bytes
SHA-256: 290559d6fc5da1e39082b2322415b9aab75825583aaf62c4d4f33faaf5ee6c13
font_02_sfnt_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 17440 bytes
SHA-256: 9fe663016f97ddbd30fa26b054f1f2cabaa47eeff1482a087d00ee89f6483e6b