Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e6b6ef13ad20dc…

MALICIOUS

PDF

75.6 KB Created: 2021-03-22 22:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bf180e7abfbd14307d1c2830f4bb4170 SHA-1: 2b74437607cf175a61a65e77200897ea72a64633 SHA-256: f2e6b6ef13ad20dc1ded14b858597fa91673c1b4d27df99442020f2213802f88
136 Risk Score

Malware Insights

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

The PDF contains an embedded URI and a high-severity heuristic firing indicating it's an SEO redirector for 'free-download phishing'. The primary URL, https://golowaki.ru/wix?keyword=white+pine+county+warrants, is identified as the malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://golowaki.ru/wix?keyword=white+pine+county+warrants PDF link annotation
    • https://cdn.sqhk.co/vurikede/0cidbib/72188186775.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/ahdjdDa/demise_of_nations_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/ih4edXv/8_ball_pool_hack_iphone_x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_6011e3104c3ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_600e01a894d35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_601003909f5b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_601e874d9104b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421472/normal_6008f4ebe3121.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/fogibi/the_science_of_psychology_4th_edition_access_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00174da-a115-44c7-aed9-092c372729bc/the_linux_programming_interface.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/24562542715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb19975-1ac2-4a32-97e8-a2501034a46b/60464925211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905ba78b-f321-447c-824b-a54c18a0d94b/juxinijetowup.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/42470618231.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/american_idiot_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/cuneiform_cartilage_nodule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e63343-9aba-4e0b-abba-bf590b20ac16/how_to_cook_rice_in_tupperware_stack_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76c92b5-b0ae-413f-b1ba-73f0adcebeec/zalolamug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547f9a32-2005-4e78-8169-f2aadf5eaa3c/present_perfect_tense_exercises_for_class_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b723f1d8-96df-46cf-be1c-03ee002b4b58/an_introduction_to_language_10th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/gopofuwuxuvalebevewilufa.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/canidae_puppy_feeding_guide.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_off0000de83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 3304 bytes
SHA-256: 7c54c13321a22b13e8c8cf75e560e9151677e82cfd7fb4553fa360d909f90a16
font_01_sfnt_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 5196 bytes
SHA-256: 812f9e5d5b990d0e57489d2a03152707705c02c6f28f23126ccd819d4dd41bd9
font_02_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 10572 bytes
SHA-256: e911ceee1bb13576be9edf77b39b6f601a503511e78bd8a741b2a7fa21abefd0