Malicious PDF — malware analysis report

Static analysis result for SHA-256 e885cbe8dd312319…

MALICIOUS

PDF

71.0 KB Created: 2021-01-13 08:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 615880150404154b703017fb3a67977f SHA-1: 7a5c83a142ab39c97afd9b3c960c0b3d88feedd2 SHA-256: e885cbe8dd312319adb2fcfed842de3e3b7f9bab13be327c30ce9caa2f0916f5
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains multiple links to external websites, including a known malicious redirector at 'traffking.ru'. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains keywords related to 'school closings', suggesting a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?utm_term=school+closings+richland+county+sc In PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/vanefipafovavox_vetozitise_zupilulo_duxafawe.pdfIn PDF document text
    • https://josadezabo.weebly.com/uploads/1/3/4/4/134490641/2839572.pdfIn PDF document text
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/sedefubewef.pdfIn PDF document text
    • https://monemoret.weebly.com/uploads/1/3/4/6/134667898/xaromo.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/439fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_5faa37a5d4a7f.pdfIn PDF document text
    • https://nanopimage.weebly.com/uploads/1/3/1/3/131398258/tidute_zexovog_pozavedigati.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/fheihtn/mystic_messenger_zen_route_day_8_chat_times.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/5243257.pdfIn PDF document text
    • https://site-1168108.mozfiles.com/files/1168108/celestial_bodies_character_list.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/ghZozjc/nyan_cat_lost_in_space_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/ha58ifm/ritakegasibokerokutukad.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/TDgfFgf/buvufobakibidobuwekabunu.pdfIn PDF document text
    • https://xiwiriled.weebly.com/uploads/1/3/4/8/134899872/dasomos-kenaje-jalexer-zinuporu.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/bia9uij/67951483443.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 5404 bytes
SHA-256: 705aa1f082492989e3044ec3b1a88baa1bb209883ff9a2646bc74cb8473f4a7f
font_01_sfnt_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 11144 bytes
SHA-256: ce2358a05bbbb53940450e36dcfffbc2344ab211c3bf80344be24a92780f65c5

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