Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d78e97cc15b95f7…

MALICIOUS

PDF

84.2 KB Created: 2021-08-27 11:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 817f3db1482172e4e56d96dc57f4ea3c SHA-1: 44782ff07b941551d9b74706b7789a913bdaffee SHA-256: 1d78e97cc15b95f7f46de42f309c2eae887344cfc16edbb32dafe345c91f06c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/3453cfa4cf862b153ee48e3a63a4fd7f/fosilulodiwiwasuka.pdf In PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/rumizipej.pdfIn PDF document text
    • http://becucci.it/userfiles/files/lijop.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/selugegutibaxosavavite.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/lezupubazumozup.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e950a6753---taxalefusajibatotug.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/sewuge.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/pofogivobadenazovabed.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/6721252258.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094af4d4d59a---todabumelafed.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/28e57ea7eeac69d53b4597fa37d8b400/japavowoto.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c227b6561661ddbc9381c94ba4d076a8/52474689665.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/8kfuvqkb81avr8sj4m5ogo46b7/55271781330.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/butilegijojijejolijedev.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/zenuvetujog.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/ac8697bd982a5461eddcf6b633de61f1/38513705597.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/10557779180.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084d22d66fb7---bojeziwiw.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/reburulugoxikewul.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/soranrmq7c1idsprvsu0r4dq7i/97942236200.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c873390c86a---31650540377.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/zijisez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=progress+monitoring+reading+comprehension+passagesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 16932 bytes
SHA-256: bdde3e85c62af14d3d0f84d5627f4e5334f61f0e2cbc23e91603bd32522a06b7
font_01_sfnt_off000111fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FE 10916 bytes
SHA-256: 47194674831023c88ba9299b332ea5cfc30400e7cd27432e727d8a2121985e7d
font_02_sfnt_off00012add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.