Malicious PDF — malware analysis report

Static analysis result for SHA-256 d982550f918a8888…

MALICIOUS

PDF

78.3 KB Created: 2021-03-10 16:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ffa3914382ad177b7520d6ffd6fc9cd4 SHA-1: 01e596952dccc276fbcf9d884d977358489a6d0a SHA-256: d982550f918a8888881fe93f15c85645ec3e38f35baf288babe3fbf87aafcac7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a site that appears to be a link farm for SEO purposes, disguised as an academic IELTS answer sheet. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://jottigo.ru/award?keyword=academic+ielts+reading+answer+sheet+pdf PDF link annotation
    • http://lowazaz.22web.org/abaddon_dotabuff_guide.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/efd1c93f7d.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/how_to_use_pimple_patch_cosrx.pdfIn PDF document text
    • https://faxusonugavipil.weebly.com/uploads/1/3/4/7/134741565/2eabf0421f3659.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/pioneer-radio_sph-da_120.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/16026201601.pdfIn PDF document text
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/2673346.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/wekibik/92468974187.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/which_of_the_big_five_personality_factors_have_self-discipline_as_a_facet.pdfIn PDF document text
    • http://venudupukir.rf.gd/gurozevojofovigizakurodus.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/govasani.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/ishikawa_template_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/92716518613.pdfIn PDF document text
    • https://0ddd2631-58c7-464c-86d0-a5d1d8121c04.filesusr.com/ugd/301b85_3601bc9efda445d9af361a512cf8a4d7.pdf?index=trueIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/muvidaponit.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_b1a808784bab4e2683b352f4ba27598b.pdf?index=trueIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/rodod.pdfIn PDF document text
    • http://fegedux.epizy.com/lebalojawetavawa.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/75507929679.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_8f91f27288d74633b664bd56c26c9e8e.pdf?index=trueIn PDF document text
    • http://soranodabiwegi.myartsonline.com/ge_washer_timer_repair.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/14198845919.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_off0000f491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF491 5652 bytes
SHA-256: 52243e120b535689edddf917d651e4362cd0cf732d7b68cefb88afc9226d6be7
font_01_sfnt_off000107ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AD 10412 bytes
SHA-256: 641869694b2c99f183d6041daf68df11f402800c2d2aceff61261c68418b04cc

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