Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20fe1098a31d3cf…

MALICIOUS

PDF

78.7 KB Created: 2020-11-13 09:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7a6ada69ebdc59a6a1d00c6ba44f52ff SHA-1: e19d5c9eaf5cb7ccb6a057eb30ee975b8fff5577 SHA-256: b20fe1098a31d3cf732f4a40721dc8470829df75cc81a2acdf550af0769256c7
262 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple heuristics indicating malicious redirection and a link farm, including a critical finding for a PDF redirector link. The document body, though heavily obfuscated, appears to be related to 'ebooks warez 2018', suggesting a lure for potentially pirated content. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/strik?utm_term=ebooks+warez+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5fa1f95e1e6af.pdfIn PDF document text
    • https://xobisajak.weebly.com/uploads/1/3/4/2/134234638/xofevevarapuwurupez.pdfIn PDF document text
    • https://gozekukapitob.weebly.com/uploads/1/3/4/4/134443516/jiladugi-guvef-zatipo.pdfIn PDF document text
    • https://zipiluzus.weebly.com/uploads/1/3/4/2/134234939/jigitonuwe_vezejogeke_jevakifovopo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ribowexulo/mowefupinowojopevuxuke.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/assured_shorthold_tenancy_agreement_england_and_wales.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/katepipodijutoxigilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96032599-9416-4c97-acd9-a3cfcbe3dad8/30722174151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5b4f79-39a2-49fa-aece-cdd36ff70a4b/strepsirhini_vs_haplorhini.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/resultant_vector_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/accouplement_moteur_pompe_hydraulique.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC689 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000d67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67D 5024 bytes
SHA-256: 1ee7005dc819cd3bcde93f3c7eac7b488cab193d5ebe1ed9e34cfcbdc38a7a55
font_02_sfnt_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 10304 bytes
SHA-256: 188c9c932d7344cbb82b85752e649407444e77f410767041df36b8e95ec19b0e
font_03_sfnt_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
font_04_sfnt_off00011fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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