Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5d8b240d46f2e3…

MALICIOUS

PDF

86.3 KB Created: 2021-04-03 20:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bada3834e7e77d18b1e2d51f552b3de4 SHA-1: 781f34ad3f0a6d0b76a58489ba040bd6bf0c2247 SHA-256: 3d5d8b240d46f2e3427946638dbeb5e0dbf6e26a558da36d4b1fbd9ab66380b5
156 Risk Score

Malware Insights

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

The PDF contains a lure for a free download, redirecting to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a malicious site, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/strik?utm_term=long+range+vs+standard+range+model+3 PDF link annotation
    • https://cdn.sqhk.co/rurokusulos/YjhjitD/19084697840.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jAgheif/wano_arc_episode_list.pdfIn PDF document text
    • http://stikc.xyz/bose_noise_cancelling_headphones_15_manualz4c7i.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/aEjehM8/56095999991.pdfIn PDF document text
    • http://yesitalia.fun/zesogovsa79k.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/hilrhgz/fezulolezakexebukalewoxov.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/EpgfiiK/dr_mario_world_1_level_31.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/icxqMoi/29468698071.pdfIn PDF document text
    • https://cdn.sqhk.co/vozedolurezu/fjcgcha/sirope_en_ingles_traduccion.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/ibheGII/rejeseworizugifukolife.pdfIn PDF document text
    • http://clebohets.xyz/samejigenomukujux9njlk.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/wihbzJc/80144141767.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/icRhcia/35862640343.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
    • https://uploads.strikinglycdn.com/files/1a040d0c-cedc-46d7-a938-972a516730f6/57325939353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ef89f7-0dbb-4585-87ba-278ead23ccd3/gepinugis.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/fesesuroxufeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b818c51-345c-4657-b53e-56a011bd8d64/mezibe.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/d_d_character_backstory_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8685046-487c-40cd-b039-3c70af78222b/jvc_kw-r910bt_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08b4387-3630-4598-996d-23b47fd8553f/fomewonepizumanimiloluji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a16457a-a5b1-4840-b6d5-e8ec375a77ce/zimobavigirijasoxeralupez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9fdb82a-19b3-42f1-a4a8-16e75164263a/witilegafax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdfa899-96a7-46a7-873a-de01c8e752fb/what_do_i_do_if_my_gas_fireplace_wont_light.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 5052 bytes
SHA-256: b0794402d43395fdb2ab9dd618f5fb8204197a15affeda617f39199abb3d2b3e
font_01_sfnt_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 12108 bytes
SHA-256: 2ead3c98324d60945c048e56d7253ab3b5023fdd8085113604fb65d7becd4c8e
font_02_sfnt_off00013b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B91 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c