Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0007899bcea1f0c…

MALICIOUS

PDF

81.1 KB Created: 2021-03-30 06:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0ba31843eadf1dd0c6ec6038a59031e9 SHA-1: be746f45ec3f2429f8aef86b1095ddc60b52011c SHA-256: b0007899bcea1f0c9b044eb619d7686f9bd73aaadfa9a36c37197e44d80c1b0b
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a 'book pdf'. The presence of multiple external links, including one flagged as malicious, indicates an attempt to redirect the user to a potentially harmful site for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=forbidden+archeology+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5fd6387a0dac6.pdfIn PDF document text
    • http://mrshadow.net/kewerovetizipidel7folu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_6037e776a3c5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_605dc2092c5be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5ff0f45132222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410986/normal_5fcd45232ccef.pdfIn PDF document text
    • http://italiahot.space/pibojavovey8iq6.pdfIn PDF document text
    • http://graatorama.space/shogun_near_me_phone_number4n7yx.pdfIn PDF document text
    • http://bestunew.xyz/dash_server_portic8yi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_e0fabccc1d5b4cae9ce78aa9eeb313f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/didamesigobose.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/28027234784.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/jizesesito.pdfIn PDF document text
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_7ed43991a8d440ab8e7a62382c1b8b97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/31489416443.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_a474586bab1443dfa6376486bcdf65ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/benurarofi.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/60719491335.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/43919498156.pdfIn PDF document text
    • https://5f1c1209-45f6-45c0-988a-e0aaa04be055.filesusr.com/ugd/ba5820_9e56ccff41d94865bc5cdbd0f9419e3b.pdf?index=trueIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_23fbc54d25b948779f4022977c6f7938.pdf?index=trueIn 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_off0000ff42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 5500 bytes
SHA-256: 0edbce20eb43fde297d64b18d22b032dc5d6ec5e47d3ba4ae4d2df69bf21971e
font_01_sfnt_off000111fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FC 10848 bytes
SHA-256: 76ce1c06fbb0b74ad1a356f2b1f8443d53acde160d202fd610c3c5ad73faf26a

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