Malicious PDF — malware analysis report

Static analysis result for SHA-256 620133b224af320c…

MALICIOUS

PDF

82.5 KB Created: 2021-06-27 00:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ede22ba4c0c2cfc2c6ecc6f61f991a26 SHA-1: 366c94490455f46eb49059d37a317997422ecbd9 SHA-256: 620133b224af320c95fcaabd13d5cd547bab329413dad3a34f6c579a15e3f6f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's used to distribute malicious content or phish users. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery attempt, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ck7ksg86mg7oioamd78ef6405e/fezexijatologanatoxaso.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/05e79abb7b079688ddafac504e8ab725/29364774764.pdf
    • http://axiomestates.com/userfiles/file/44733845729.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/862979b72ab0f8622c9ec647168cb18d/mawijenisaviduzat.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f3699880---4307592000.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de20388c17---razunizi.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/d7d6416912e1632632ddd8c2c50ea6e4/90687387539.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e90046192---disuxalavedexukuf.pdf
    • https://hotellemaritime.com/hotel/upload/files/2558727500.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16082c29aa10d9---40873272690.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5a5266ee3---pupogelemazeluwapuxozeda.pdf
    • https://lacecinella.com/writable/public/userfiles/file/37827291416.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/dd7f1a8ec43f88150e799ce7bb2afd1e/40111805584.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/d54021a39070b67863014b80002c3c52/livunadu.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xonobuguxejudid.pdf
    • https://ancoraeducacion.com/images/fuvibabipinab.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/bbe2a5da4e1fe93d3998be083f8f4618/poguratakemosowemonusor.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a3c93e60b51d83655c18d183c4782999/sadikebetomarejofovusete.pdf
    • http://blbr365.com/userfiles/file/1621009125.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/7lee6jh1q0dp3oiahfrldpiukk/mojatekekutexulabow.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/afd73652824312350fe7c47ac64f8860/lavidefokojujuguroxujixuw.pdf
    • http://www.heksan.com.pl/file/pirib.pdf
    • http://studioambienteterritorio.it/userfiles/files/62970877757.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b407a35db65---15652127638.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=advanced+soil+dynamics+and+earthquake+engineering+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_off0000dcec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEC 16792 bytes
font_01_sfnt_off0000f4fe.bin
07f7336ae913b8d3532688d26976a07c9b162e7f95c210fe129ac9136f2ec40d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 16980 bytes
font_02_sfnt_off00012173.bin
0bb2993268d73e785759c46c51aa3bbf14faf78e7255f10bbb2f7ca125ff42d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12173 11568 bytes