Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab48e1d572f46452…

MALICIOUS

PDF

81.3 KB Created: 2020-11-14 21:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 871234756502acd4d2db8c658f398719 SHA-1: 973e2d5c2a548477a4dfa0de14baec078d5ade40 SHA-256: ab48e1d572f4645240612b8b67800f3a171edb6cb663497f8bab34c9034200f9
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=glow+in+the+dark+fishing+rod In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f8d5c145f0f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5f9f7af855a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f9139eef0324.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/tirejuma.pdfIn PDF document text
    • https://xutifivaluladar.weebly.com/uploads/1/3/4/3/134337767/1147467.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06a9c4a-bd75-458f-9318-46f9d64140be/49687960063.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/semilevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d0df4b-c7d9-45ff-aecf-99c8a8c46beb/sylvania_scr1986bt_as_radio_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62bd8ac-3343-4f60-9869-00b03316a5c9/the_power_of_six_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc91c23d-7d1d-4579-b321-50047b3bf159/call_yahoo_to_recover_password.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/dragged_across_concrete_streaming_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf609ce4-328c-43f9-bfa2-99356f22890f/rerawefinilukar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03cb3682-f707-4ab7-aa48-8ede41d4069e/33332825505.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010e65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E65 23712 bytes
SHA-256: e1da55ff7c2962f606308708f3875585ce62da355632f4cf349cb24ef5ecb897
font_00_sfnt_off0000d3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C9 5356 bytes
SHA-256: 68345bade18e11febd882790f0e588b77a31bc9d56d3fcd039ae88f8cdfc9e3a
font_01_sfnt_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 12028 bytes
SHA-256: 7aee39926d6ca93c11f68bca8855de0c230edc320a467cb0380e7498a32c93da

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