Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a71ed45e3167f9…

MALICIOUS

PDF

71.4 KB Created: 2021-09-27 03:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efae0664c0c96777e2489567bb271b8e SHA-1: 909781788a531e90ac77046ccedfd460583c0c1c SHA-256: d9a71ed45e3167f972f56adb286f36e0bbbedb97749d7b874f173b7f35c1eb44
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://jinsonmetal.com/Upload/file/vobesi.pdf
    • https://drticket.ir/basefile/drtiketcom/files/43978072651.pdf
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/77959214131.pdf
    • http://bongoes62.dk/userfiles/file/goboresodonexaposewop.pdf
    • http://m3hotels.com/userfiles/file/bedigeluzorisi.pdf
    • http://tfforming.ru/d/files/71521002522.pdf
    • http://yaan121.com/uploads/files/202109040226557662.pdf
    • https://pacpartner.net/images_client/imagesfile/famabu.pdf
    • http://engelholm.boj.se/uploads/userfiles/files/93558062192.pdf
    • http://af.ssla.ru/images/fornews/files/nimeviritib.pdf
    • http://refinerlink.com/userfiles/file/pazepejebejuvigusesupiduf.pdf
    • http://topmebli.com/content/xuploadimages/file/587409126.pdf
    • http://haciogullari.com/depo/sayfaresim/file/sagazumupafafeb.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135284670d26---399697626.pdf
    • https://loctra.net/userfiles/file/77955454790.pdf
    • http://longbeach.ilovepokebar.com/uploads/files/jojonotusulabiromem.pdf
    • https://beauty-full.ru/uploads/files/90645237067.pdf
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/59779565883.pdf
    • https://stomatoloska-ordinacija-rijeka.com/files/70497768964.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/zagubogawiwedanivapegix.pdf
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/47785474316.pdf
    • https://ntiverification.com/userfiles/file/tonetagesebuz.pdf
    • http://interface-referencement.com/userfiles/file/55918361588.pdf
    • https://marikakozmetika.hu/editor_up/79057563761.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146b57915561---51391659530.pdf
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/sobijimazikavotasotonila.pdf
    • https://ivanamihic.com/files/99062762628.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=jogo+de+tractor+farming+simulator+2020+mods+android
    • 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_off0000b38f.bin
f2c198687f1b5d799581b330c14ef3b7311724648e6bbdf5a40fc8d200492fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB38F 16772 bytes
font_01_sfnt_off0000ddac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAC 16792 bytes
font_02_sfnt_off0000f5c3.bin
c8ac13c8d9697ce180ea502ce70e03fc711b4b32fbd585ed3a570c23f1c8eb9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C3 11152 bytes

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