Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c9144d664818e2…

MALICIOUS

PDF

74.3 KB Created: 2021-03-01 13:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1382f4227850d49c39ac6f03b481c94d SHA-1: ffaa202c4be6fe128252ba0080a540fcfdd00232 SHA-256: 63c9144d664818e2fad70d1ccbdcee0c1728119706839cbc73a91b2092eeba68
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating redirection to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/strik?utm_term=little+house+on+the+prairie+cast+what+they+look+like+now In PDF document text
    • http://tijuruwiku.22web.org/dropping_ashes_on_the_buddha.pdfIn PDF document text
    • http://zipogagu.iblogger.org/42938142294.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/jifalurikuf.pdfIn PDF document text
    • http://masuxuxu.iblogger.org/77332270374.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/xuwijagidofizafojiduko.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/bumaxuxuxokiromemij.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/futozesuremaxovekumopabo.pdfIn PDF document text
    • http://shop-kid-toys.online/347633247398ganl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tubonunok.epizy.com/oxford_english_dictionary_drive.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/govinda_namalu_telugu_lo_kavali.pdfIn PDF document text
    • http://sumewapedujevi.rf.gd/independent_contractor_agreement_template_texas.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/what_does_a_career_in_data_science_look_like.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/35357247406.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/char-broil_the_big_easy_tru-infrared_smoker_roaster__grill_recipes.pdfIn PDF document text
    • http://kudugumokob.epizy.com/tujupovajiga.pdfIn PDF document text
    • http://daparetefofan.epizy.com/namiwa.pdfIn PDF document text
    • http://tojegazanet.rf.gd/traductor_google_espaol_portugues_portugal.pdfIn PDF document text
    • http://vogidide.epizy.com/vovoruku.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 5220 bytes
SHA-256: 6df5fdbd6d45eef341096a9f3f2ac11390415aa3ad6feb5d4242e91c10645018
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 10040 bytes
SHA-256: adaec001aaa376ff1dc8a8fa6ced702fb82deea5a47198a7e343a6488a31ebc4

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