Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fea43dd0742f95…

MALICIOUS

PDF

86.5 KB Created: 2021-03-25 18:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 209ba59e06c352114b833f4f5c8a3b7a SHA-1: b6d9a2c922625579a7cac565f8df06fd96fde57a SHA-256: 94fea43dd0742f957b187f4d6c90faf48ea66a2adbd027adff24ab7f0365b8b9
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a prominent one pointing to a suspected SEO redirector. This suggests a phishing or malware distribution attempt, likely using the 'free download' lure. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and linked URLs are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://pelibifir.ru/wix?keyword=hugo+weasley+wand PDF link annotation
    • https://cdn.sqhk.co/noxomosanena/ejruja0/pilex.pdfIn PDF document text
    • https://cdn.sqhk.co/riluvexudeve/QjjQoZk/vasalulonaxixe.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/pizikizikefinidagamolu.pdfIn PDF document text
    • https://marajudalade.weebly.com/uploads/1/3/1/4/131438096/9389284.pdfIn PDF document text
    • http://mizejodaf.mywebcommunity.org/47525347843.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/rO2tsid/ripujejoxoguba.pdfIn PDF document text
    • https://bojebunu.weebly.com/uploads/1/3/0/7/130775379/5963083.pdfIn PDF document text
    • https://zijobezugol.weebly.com/uploads/1/3/2/6/132682913/ab6f0bc24.pdfIn PDF document text
    • https://koberowebajufom.weebly.com/uploads/1/3/4/0/134096943/ec9c4098.pdfIn PDF document text
    • https://pejifote.weebly.com/uploads/1/3/5/3/135348690/retoputed.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/jenisozazewubo/adobe_audition_cc_2017_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/xukusolibuwipemifujewux.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/metales_alcalinos_terreos_informe.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/16856738567.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/nugedejewogedutubazipore.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/snaptube_update_version_2019_apk.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/84623118469.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/nefademitaxejuwul.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/91183741401.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/analytical_chemistry_lab_report.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/nissan_almera_n16_service_repair_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC08 5052 bytes
SHA-256: cabb098efa75e12e5a34e7ac27b35dc8737dbf43e431bdba79c7866601b81ae3
font_01_sfnt_off0000fd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD63 11480 bytes
SHA-256: ff8361f07d78ea4c64c2325f4a3d6f62ae8cae31cb5e975b53f00e263a2e1649
font_02_sfnt_off00012431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12431 16724 bytes
SHA-256: f1aec4c27b41e789b4bb7ef1473bc5c2254a2fd53be25beaf1872bccc612b0ba
font_03_sfnt_off00013afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFD 6140 bytes
SHA-256: c9998c70cfa90d23ac3789bf4a6c6008034098a4f34219452bc1f08823d2e24b