Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e02ca03998bbce1…

MALICIOUS

PDF

77.9 KB Created: 2021-04-09 17:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2dbb001c28601fa42764b4f16e6d13f3 SHA-1: 66c4b3be119995288575ae4d305db7b7b01190e0 SHA-256: 0e02ca03998bbce1db64d5c467cef3d54a60041093f0ca896d9c211131032c70
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily corrupted, appears to be a lure related to product reviews, directing users to the malicious URL.

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://jottigo.ru/strik?utm_term=graco+nautilus+65+3+in+1+harness+booster+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455176/normal_60344c9200b42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_6041a515861aa.pdfIn PDF document text
    • http://fastpysystem.online/12812407119p8zg6.pdfIn PDF document text
    • http://esparks.ru/action_movies_2018_now3v6jj.pdfIn PDF document text
    • http://gayerkan.com/batulelus029wi.pdfIn PDF document text
    • http://converstarget.ru/comparison_between_maslow_and_erg_theory8wdwx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_60120a5ac60e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408593/normal_5fed119cb40a5.pdfIn PDF document text
    • http://everydayy.fun/steam_client_cs_go6h8zx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_606381507d449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gonima/wikafakupuza.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/94495363633.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/fepoteja.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/3d_model_free_for_sketchup.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/cuneiform_avulsion_fracture_radiology.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/brownlow_medal_2019_tv_guide.pdfIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_c99fc11763814c05b53e6f2b543f2054.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/how_to_type_copyright_symbol_on_photoshop.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_03859b9004424e8b883982c99ae17cff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/37586996763.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_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 5704 bytes
SHA-256: 66fdcb6f58210f7362828ed70f58e0ccf333a307a11ade7ec9e5df48dbf5528e
font_01_sfnt_off0001040a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 11048 bytes
SHA-256: dfca1d13e71df35604ab486a6b0ad5ab0317af568479b9c8fe0cafa3e24f137c

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