Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b3f6101749b43c…

MALICIOUS

PDF

83.1 KB Created: 2021-09-16 09:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 345aec5d136288194ef49c5b5071e70d SHA-1: b5a2aca2240d628d3e4f117d633963fde3017614 SHA-256: 79b3f6101749b43c51298af65eaaa6547b844abe171b58d69d4c0440c43f01e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically pointing to a URL containing 'cheat hide online unlimited money', suggesting a phishing or scam lure. The presence of multiple links on disposable hosting also indicates a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 5

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=cheat+hide+online+unlimited+money
    • https://www.iieng.org/editor/ckfinder/userfiles/files/jovanokusibefefexalajezu.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/f652m3nlfn07kqfsdenvpcd8v1/lumupojesenototo.pdf
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/64487914332.pdf
    • http://stringquartet.biz/web/images/fck/file/42155361207.pdf
    • https://nbtele.com/en/cache/fck_files/file/biwixubovalenabiwoxige.pdf
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/sejuvulanewubifojorumosi.pdf
    • https://resicolor.com/upload/files/xefuporobadodo.pdf
    • https://weldingportal.it/userfiles/file/rojij.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a832b9513d---pizafikedewepabenom.pdf
    • http://tahyuh.com/uploads/files/202109082022014662.pdf
    • http://sameiroeventos.pt/ficheiros/14287045146.pdf
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/11713007875.pdf
    • http://keralatravelpath.com/uploads/file/barazilejipewurix.pdf
    • http://xn--m1age8bh.xn--p1ai/files/file/xokokejujokepawa.pdf
    • http://musiclivemarsala.com/userfiles/files/wozojofixele.pdf
    • http://pphu-joanna.pl/fckpliki/file/mewilovirexa.pdf
    • https://camelcarpet.org/d/files/45420525032.pdf
    • http://dagmare.de/userfiles/file/86163411927.pdf
    • http://hyundai-baoloc.com/luutru/files/53000155779.pdf
    • https://prawobrzeze.info/userfiles/file/23813396615.pdf
    • http://trieuduong.com/images/Download/28385222261.pdf
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/nezamuxodaberejivi.pdf
    • http://madinaboys.com/easydo%20v2.00/files/uploads/26329818989.pdf
    • http://mwcapital.net/ckfinder/userfiles/files/7003638099.pdf
    • https://myshalewell.com/userfiles/file/texufulizesotefa.pdf
    • http://studiosantomauro.it/userfiles/files/wolodiwu.pdf
    • http://atek-ent.com/upload/file/60036231121.pdf
    • 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_off0000e17c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 16792 bytes
font_01_sfnt_off0000f98e.bin
a435e305b432d577751586011ffa53d8886c38b7d52a14a8ef34b287fd9106e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 17620 bytes
font_02_sfnt_off000126fe.bin
15799c97bb3d54458813f77dfa0bdc4c10cd8b7aa37c1423c4207f947ba40fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 10488 bytes

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