Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3aa450e63660444…

MALICIOUS

PDF

95.0 KB Created: 2021-07-31 06:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2d7ca5ea8ab2a75237857f85e3a1bd3 SHA-1: 97a86b3077a0dfaf4fdbd85e1ce916b32ae072fd SHA-256: a3aa450e6366044451969e5d91eea1ceef77082106ed90446921df5d5b927044
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution scheme. The PDF likely exploits a vulnerability to redirect the user to one of these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://diversecityuk.com/userfiles/file/wowawisugalikowira.pdf
    • http://dream-mebel.com/pic/file/notajavopanowiwupuvojesa.pdf
    • http://whippets-au.com/clients/7/7f/7f5032e15db821a993a8146895416847/File/96212897986.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6571aed4e1---46068411750.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/0ae85e05e2b6142aaa8d0361181ae602/wujetadudexasedola.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/586b527e33a1d2fdbaa6ec4c0da182db/48312013072.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/7ofq8srmmvqv5o29upu5sdp6k1/mofazegurajumarira.pdf
    • https://777mto.com/contents//files/10562733939.pdf
    • http://ulv-fogger.es/d/files/29329719024.pdf
    • http://microcement.ua/userfiles/file/21521012335.pdf
    • https://sardavetri.it/userfiles/file/laliwarawuwuj.pdf
    • http://sadiqandsons.com/userfiles/files/kalarevarag.pdf
    • https://blsautomation.com/ckfinder/userfiles/files/31797764060.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f169b71803---67508105964.pdf
    • http://sport-way.ru/img/file/togiresep.pdf
    • http://movitecnic.fr/ressource/site-image/files/fudasuraru.pdf
    • https://turismopontevedra.com/ckfinder/userfiles/files/nodozu.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/e338809e6e1c7b387ea3992b37dadde2/37696407416.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa32f578ef---37788636882.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7gut8f2sos81geo4t23tc2i7g3/wemelofugatuvitod.pdf
    • https://actor-conseil.com/files/file/sijajopopanamewen.pdf
    • https://kovosluzba-praha.cz/res/file/rufojule.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/18vcohqfmmc7vgjhufm1t4faf4/zepivom.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa6db2c7b5---wozapukolazasarogixon.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/5776973989.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=2019+dodge+challenger+hellcat+redeye+engine+specs
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f91.bin
38dc43f285d1c23f9638def6b39d8456728b4b1a23596c0e080d16a2326346bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F91 16380 bytes
font_01_sfnt_off00013a29.bin
710309c36945300d0961b30e2af96ee3a4748f87d641dbc0795357c40c0b91d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A29 11272 bytes
font_02_sfnt_off0001546f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1546F 16792 bytes