Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a56366efa26b582…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 06:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71d097effbf0df1f761eb45da4c13684 SHA-1: e0f11d285e594b38be14844f5ddfa7630deb06e6 SHA-256: 7a56366efa26b58222c888aed0dc5b98fe3a4d459af1e48c00f7b551c86791c2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous links to disposable hosting and a deceptive download button lure suggests a phishing or malware distribution scheme. Although no scripts were extracted, the PDF structure and embedded URLs point towards a spearphishing attachment attack pattern.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://turinimoti.com/assets/userfiles/file/lemipakawot.pdf
    • http://ohmamakitchen.com/uploads/files/gukapifasoriwari.pdf
    • http://wernitznigg.at/files/direfaxojakunimitokoxadig.pdf
    • http://wwpokebar.com/uploads/files/85548297443.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb3a355a8c---19064799342.pdf
    • http://31kouqiang.com/userfiles/file/1631018824.pdf
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/vesalobakefevepujuvi.pdf
    • http://radiopoint.cz/userfiles/file/97620283473.pdf
    • http://oshcongregation.com/userfiles/file/gezotibagolibup.pdf
    • http://www.beautyvogue.ch/Files/file/40772186926.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16134a63492d18---54815615809.pdf
    • https://tworaise.com/userfiles/file/fonomisafaxomowudilu.pdf
    • https://pharmawell.eu/ckfinder/userfiles/files/jususesukabevapesuve.pdf
    • http://mamaskitchenorder.com/uploads/files/71750950468.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/408bd8f4d2c68026d338d2650810b2b3/wesenibu.pdf
    • http://nensi.si/upload/file/37084368327.pdf
    • http://cafesezony.ru/fck_editor_files/files/sepidodubal.pdf
    • https://bem-sa.com/img/file/mupekadunutif.pdf
    • https://jmclimatizacionhvac.cl/images/subidas/file/nigekunaropor.pdf
    • https://kildevangen.dk/files/vuxibadime.pdf
    • http://itexpertdog.nwoasis.com/upload/files/jexibove.pdf
    • http://studio5r.com/userfiles/files/16815989102.pdf
    • http://ckud.handysociality.com/upload/files/woteduxogawe.pdf
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/89235982849.pdf
    • http://suvagcentr.ru/userfiles/files/49205129967.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=koi+live+wallpaper+apk+full+version
    • 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_off0000d2fa.bin
a0d7692ab9dc11b89ae2a37654c2fd7f175c54a37916b67b62159909005dde69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FA 10588 bytes
font_01_sfnt_off0000eb53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 16792 bytes
font_02_sfnt_off00010365.bin
853c95411a95d00605ba233acee53dde731fb59e595da34c0fda5ff6c26cb2c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10365 17636 bytes

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