Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba70061f1abd651…

MALICIOUS

PDF

72.3 KB Created: 2020-11-20 18:38:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 02fb99f9f0b23d16cd703182f743e846 SHA-1: 2c3dee8865cd5c0483ac00e9058fca0b28a3eb0a SHA-256: cba70061f1abd651e25533a0f51e09b43b64819ed4ac22f6a7cc8170bfa80102
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing embedded links that redirect to known malicious infrastructure, as indicated by multiple critical heuristics. The document body, though heavily obfuscated, suggests a lure related to legal documents. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary attack vector appears to be a phishing attempt via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/123?utm_term=affidavit+of+good+moral+character+sample+philippines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fade3bf9d516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5fb2a62a87099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_5fb7103a7e7bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_5f999a4c125d5.pdfIn PDF document text
    • https://kuvikopar.weebly.com/uploads/1/3/4/8/134870245/8315ef93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f9a2d27235bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f892249f3014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f907446caf47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5fa813ae70732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f9596ac7c7e7.pdfIn PDF document text
    • https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/6402073.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/zewimu/call_of_duty_advanced_warfare_gameplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691afc9f-2380-4a15-bb55-d57721e2c440/72098992921.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/tusiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f338569b-e5a5-4a99-b80c-447416e94e3e/18100163552.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_off0000de3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3A 5620 bytes
SHA-256: d1bb65e990c0999dba86ea5e6623eb373992475bbbce00bd590c9be182d9dac9
font_01_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 10084 bytes
SHA-256: e3b409914ae04fe9650504a893bee8b160713b68bc67c7f76d38746d26312431

Open this report in the interactive analyzer, or submit your own file for analysis.