Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b817ab8407c3e5b…

MALICIOUS

PDF

73.3 KB Created: 2020-12-15 02:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c08f0f45410164463af083bacfdc1377 SHA-1: 913693fb8eb75c5122992cc862a47e3bbd050de3 SHA-256: 2b817ab8407c3e5b2c2296a6d1e4b9eb8c81e1d48be70ea778b137864b9b5e39
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with a critical heuristic identifying it as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or redirecting users to malicious sites. The presence of external URIs and the link farm heuristic suggest an attempt to drive traffic to potentially compromised or malicious domains.

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://traffking.ru/123?utm_term=english+words+starting+with+sr PDF link annotation
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/7fde0c017.pdfIn PDF document text
    • https://panujiwawavila.weebly.com/uploads/1/3/4/4/134457592/tasofovonivajile.pdfIn PDF document text
    • https://gomejewenikugi.weebly.com/uploads/1/3/4/8/134869664/8a51bf5921fe3e2.pdfIn PDF document text
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/1743713.pdfIn PDF document text
    • https://tofabefanij.weebly.com/uploads/1/3/4/7/134726630/983128.pdfIn PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/8917693.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/kokefogizopo_zulun.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/joboz-letake-mozexigumugawom-jenilajojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4e14927a199023aceebc2/t/5fd12954bd7940538c081618/1607543129012/phoenix_arizona_zip_code_address.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c10104a8c57c1485c1c7/t/5fd60e96ffab5d3c56f0a443/1607863958892/java_string_format_integer_2_digits.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58858ff13940aa25ef992/t/5fc9ba4487b36f46d4fe117e/1607055940821/liverpool_fc_transfer_news_sky_sports_transfer_centre.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc136563398ff7515300e75/t/5fc728a209f4d56e8f7fa4e6/1606887587715/legixi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1321e2e34347c7045f8f9/t/5fc368202dd96f5918598fef/1606641698090/dafuta.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc595b3c14dfd36fe115843/t/5fc831d2b74dd54858cf956a/1606955475559/easy_cryptic_crosswords_for_beginners.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 5136 bytes
SHA-256: 5ed1ec86b58be75116478a21b82db6908d9fd362c0989221c43a130e64d6dfa3
font_01_sfnt_off0000f704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 9728 bytes
SHA-256: 779114379ec91c086dabe191c73c8c9025df41420f95d6c4e8331f4a1c4656a6

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