Malicious PDF — malware analysis report

Static analysis result for SHA-256 509553202d850211…

MALICIOUS

PDF

145.5 KB Created: 2021-07-08 00:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ddd55c3ebcb8c2b3ea2ea00684d97be SHA-1: 853af33fa6402e07aeea9dc8a7cfba171b3e7202 SHA-256: 509553202d85021180dbc1fc172f0ff850be4c7b12b5a3dc626875c61614089f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous URLs pointing to potentially compromised WordPress uploads and disposable hosting domains. The presence of these links suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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 http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/46991306497.pdf
    • http://ebslang.net/_UploadFile/Images/file/35786330099.pdf
    • http://anandtouristcorporation.com/uploads/jisedu.pdf
    • http://ovodatar.hu/userfiles/file/bikogepupoweziw.pdf
    • https://calmoinc.com/upload/editor/file/pafobibitojufababusegu.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/kakakavomet.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160bf87f75990d---41387884667.pdf
    • https://mariellatriolo.it/public/file/mexibojimisovafusulig.pdf
    • http://iccarrentals.com/files/file/59559366771.pdf
    • https://beliangka.com/contents//files/wiwimoganoxeruzijinavut.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/dimesuxelatiw.pdf
    • https://laplacedesstores.com/upload/file/xokibaxopofetegewenil.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a94fa05c6e562e5c91838d653948f9c5/bekekigavo.pdf
    • http://aggengr.com/uploads/CMS/file/tagip.pdf
    • http://theprintfactoryvietnam.com/uploads/files/kerimezi.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/11f92fe1184b3c93141e404d4b283efb/tumixivubili.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a78de55e58ef69717be43aa6e0c441b3/mivagizadit.pdf
    • http://master-sign.ru/ckfinder/userfiles/files/nugatelifox.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/k8ek55clree91fhgd2d9venlj5/bisokozufesu.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/qj81pooojutbpvhu1gi09m4bv7/kezoruzunajogejinuwolatu.pdf
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/48482308018.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd7f03d1c63---65047744912.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/cgf0gess2bq8keaa5r4gs9ndjn/sosavagikojikoxibom.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=easter+2021+meaning
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b2a6.bin
458fd5205e92a716797fcdb65c2bae78a63634f94c10db0aced27faacfe32446
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2A6 16692 bytes
font_01_sfnt_off0001ca66.bin
9eee5551a24fc46924c7721d87c9f4e97932fed15036438f4a67072d52e27e7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA66 24932 bytes
font_02_sfnt_off000207b1.bin
b095e3d6a040f902e7f57fcaf29de3780c1cd8908c0f78c46707bf093979abdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x207B1 10560 bytes
font_03_sfnt_off00021fe3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x21FE3 16792 bytes