Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe2c04aa4aeb2db…

MALICIOUS

PDF

77.8 KB Created: 2021-03-02 18:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b6afa0738f8e682b4eba788ab7bfc13c SHA-1: 9dce18f405504625a5d92a04f6c7a04f0df75be3 SHA-256: bbe2c04aa4aeb2dbd02adaae0ee678e85c374b7993557bec96f0801facf18179
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The presence of a large number of external links, many of which point to other PDF files, indicates a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://resalured.ru/award?keyword=starbucks+almond+beverage+nutrition PDF link annotation
    • http://majikok.mygamesonline.org/it_jobs_in_demand_in_south_africa.pdfIn PDF document text
    • https://sujufejunuvevu.weebly.com/uploads/1/3/2/8/132814923/wunubog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459777/normal_5ff1e8fcdf39c.pdfIn PDF document text
    • https://tuwoganerolet.weebly.com/uploads/1/3/4/6/134631505/7388523.pdfIn PDF document text
    • http://fsfsfd.xyz/walalegigetufomelafufactgq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fe6d0bd0b5b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410985/normal_5fefa31985671.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/how_to_troubleshoot_maytag_ice_maker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379733/normal_5ffa407320862.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/wadij_ponunafafi_naguvozadalaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497079/normal_5fcf51a421c13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446915/normal_5fdfaeb784579.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fumesowira.epizy.com/lg_tone_pro_hbs-760_wireless_stereo_headset.pdfIn PDF document text
    • http://bazogojuzularib.rf.gd/47360141366.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/26859022941.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 5508 bytes
SHA-256: 62a5ae4f46ab5d834b917de4472b73d78164161d3f911d3dee6b270a01ef37bc
font_01_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 10280 bytes
SHA-256: f455486e413f5ca2e81a91ab30d47df20ed97fe2285109811a68258d83212448
font_02_sfnt_off00011c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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