Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d0064385c6028c…

MALICIOUS

PDF

73.7 KB Created: 2021-09-21 19:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d13e93af594dc4288f85d881b8f6f2d3 SHA-1: 29f7fee9f66c7d8ed926030762f00112d258c594 SHA-256: d3d0064385c6028c7f30b85085c45537a97fac80853d49289d501a2d0e9249d8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The presence of many unknown URLs further supports this, as they likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://gesundezellen.de/neu/userfiles/file/28377991966.pdf In PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/19791958492.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/wularidufilarumejewo.pdfIn PDF document text
    • http://video-cycling.de/files/file/71658471061.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/72033969606.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/dikedusadigovafuzaxagen.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/12319426528.pdfIn PDF document text
    • http://bdsductri.com/upload/files/purusafunapebagerizugumaw.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/77345044179.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/11623711020.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa877637a6---14574115587.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/fadutubotaxux.pdfIn PDF document text
    • https://alwaysthesame.pt/site/upload/file/41256830104.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e41fc2a8516198f05abd3716621cb71a/legitimudafogixi.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/sivonuro.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/27563801016.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/turizife.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/59531411965.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/7468371105.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/fawadopunomararepukesote.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219211125456619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+share+pictures+android+to+iphonePDF 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_off0000bce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE5 16972 bytes
SHA-256: e546895fb399de5dfa3855a76db748671c57bc402a29a26e7a0deac474c096f3
font_01_sfnt_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 10740 bytes
SHA-256: ba2084b0e1fcfc76df6512ebb02920759ac69435ce41bd00fe2029a64cf47910
font_02_sfnt_off000100ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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