Malicious PDF — malware analysis report

Static analysis result for SHA-256 203d0d3a341456f4…

MALICIOUS

PDF

79.9 KB Created: 2021-04-04 19:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f2babff7cf07b91f0363b8443c7dba0f SHA-1: 20c2cca2e06409c75d4ddbd2c461e8423e5bbda6 SHA-256: 203d0d3a341456f442aa32b493d54226c76f7a01280e4fcf2eeac80ef8ce5cee
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document's content, though heavily obfuscated, appears to be a lure related to "Lipid profile notes pdf" to encourage clicks on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=lipid+profile+notes+pdf PDF link annotation
    • http://kugoramex.iblogger.org/when_the_bible_was_translated_into_english.pdfIn PDF document text
    • https://kuvutokejutal.weebly.com/uploads/1/3/0/8/130814176/dudoverikemex-rabifapozavomo-zowusobizonupag-supalilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5ffb10b424030.pdfIn PDF document text
    • https://dolumipekino.weebly.com/uploads/1/3/4/6/134625527/bomanif_rawujonixisenif_vadejomewiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6032d6263427b.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/zijuwelawos.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/12945499121egbvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494136/normal_6039a3943004b.pdfIn PDF document text
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/salubovub.pdfIn PDF document text
    • https://gejodaxavusaw.weebly.com/uploads/1/3/4/7/134708791/nexevefukaxogutetiwe.pdfIn PDF document text
    • http://dreabling.online/64889575804xlkug.pdfIn PDF document text
    • http://citruss.space/assistive_touch_ios_13_mod_apkhgton.pdfIn PDF document text
    • http://legendbilisim.com/77812758341t3jw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5d73bf-2b79-44c3-9f0d-a38fedb00a9c/gexakunuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3c8b65-4d14-4c18-90a7-b769e52f3d05/38197442240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2042196d-9343-41eb-b624-a52a04d2404e/arduino_mega_2560_pin_description.pdfIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_8813670d62584183a0c5e920474b952b.pdf?index=trueIn PDF document text
    • http://burevomekevi.rf.gd/15208033954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f136a591-4f9c-4043-aa97-f386d28b4b7a/diamond_razor_edge_string_stop.pdfIn PDF document text
    • http://moxododokojuke.epizy.com/neruninigukokele.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_65146ebf1f2640a294c8e27722967417.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce824d1-e4ff-4cb0-81bd-fb9491112723/lenovo_g50-80_vga_drivers_for_windows_7_32_bit.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 4768 bytes
SHA-256: d4d4750e36fe355c131f69f81d6b8bbc072eda145345a26f635a7f94f1809119
font_01_sfnt_off00010cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF7 10956 bytes
SHA-256: 5bdfeb5a1ee79821322c98eb30355cb00fb1ebc8e2a5cbba74a953f2f19a3b7e