Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdedd212e9d1471d…

MALICIOUS

PDF

137.9 KB Created: 2021-03-11 18:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1c81ffeeda9f3aa50936d7a943bb9baf SHA-1: 94a7c6dc1668e206bd81f208a81cc40932bd726b SHA-256: fdedd212e9d1471d436081e23fbb64e00a2ef3fdee67df39ae4776f09ee9ac60
184 Risk Score

Malware Insights

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

The PDF contains multiple links, with one prominently directing to a URL associated with malicious redirector infrastructure, disguised as a game download. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the link farm heuristic suggest an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://yafferge.ru/strik?utm_term=warcraft+3+frozen+throne+undead+campaign+download In PDF document text
    • https://butadopol.weebly.com/uploads/1/3/1/3/131378795/9021845.pdfIn PDF document text
    • http://kvyovk.xyz/photo_background_color_change_online_freeec9fw.pdfIn PDF document text
    • https://mepuviduvudutew.weebly.com/uploads/1/3/4/3/134383325/1899360.pdfIn PDF document text
    • http://strongcreditscore.info/soundseeder_hack_apk4zl64.pdfIn PDF document text
    • http://carluxepaint.site/pozisevvqmd.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/vabanuruv.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/sowume-xadezekuw-xizazu-gifap.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/divina_commedia_weebly_inferno_canto_26.pdfIn PDF document text
    • https://natutiwuv.weebly.com/uploads/1/3/6/0/136019317/9966650.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
    • http://subogerilazelo.atwebpages.com/nasiv.pdfIn PDF document text
    • http://jadufabusen.epizy.com/71977248541.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/bukexerexejib.pdfIn PDF document text
    • http://dewonatazuji.epizy.com/work_in_the_21st_century_4th_edition.pdfIn PDF document text
    • http://xazabivi.epizy.com/zolinaderibo.pdfIn PDF document text
    • http://fupotuz.rf.gd/tukewijobadufodijex.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/broiler_farming_project_report.pdfIn PDF document text
    • http://tulopagam.epizy.com/sat_test_dates_2021_south_carolina.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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000193a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A4 6444 bytes
SHA-256: 18c2c51bcb0222f418af239f9e794f33704a466da9dc79c279fc1a6342d0f215
font_01_sfnt_off0001a394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A394 5592 bytes
SHA-256: e66edf8851036b8ce9bd219adeae35b20b07d43bd57d94262aa8051a9bceee41
font_02_sfnt_off0001b685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B685 12392 bytes
SHA-256: 5315f29bf8831046f4701406b38b5e050b043dbe27dd0c9984ee3ce2c1a35701
font_03_sfnt_off0001dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFD3 17180 bytes
SHA-256: 89e62576deedfba79bca488e29bc0e905610617f55dcfc16f65dc28096b64994
font_04_sfnt_off0001f8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8F3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_05_sfnt_off000206b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x206B5 6276 bytes
SHA-256: 3e0add15f763c1a9420b10066192ce001e5e6efb62c7490a19ecc409f853c576