Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d816b57a2f1702…

MALICIOUS

PDF

95.7 KB Created: 2021-03-13 20:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: feedb80aabb02aaf5feb764e523aff67 SHA-1: 19889e2e34beca06477675bcd27c15a349e30fe0 SHA-256: 86d816b57a2f1702c66aec289dff31e7190473c0068e7c48ef2cb73b03d3aff5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure points to a tactic of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://maypoin.ru/wix?keyword=azur+lane+ship+list PDF link annotation
    • http://kugewezebuvigiw.mygamesonline.org/43794097156.pdfIn PDF document text
    • https://zegaturivelegob.weebly.com/uploads/1/3/1/4/131437779/e4f611ff0d240a.pdfIn PDF document text
    • http://jalojewaga.mypressonline.com/apocalpticos_integrados.pdfIn PDF document text
    • https://tefawizudarezuf.weebly.com/uploads/1/3/4/6/134640126/540833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea7d77d1-c681-472e-ac47-5e145ff4bd77/1972563303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/048e4b09-c263-4aed-8668-8574c18227ea/51445102524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8062e5da-16db-4668-945b-66a8b7b9b9ca/22318404292.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/murifemobesodipa.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/what_the_bible_says_about_false_idols.pdfIn PDF document text
    • https://b1847e5b-3396-4371-b467-0d49236da063.filesusr.com/ugd/84a5c6_78bd73a5261f4093a6485b303ee1164a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/december_1_2018_sat_answers.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_965e6a45a1354d0fb6d2b8355a94e259.pdf?index=trueIn PDF document text
    • https://c4dfbf13-a41f-4180-9f7f-b1bbca248043.filesusr.com/ugd/39a0fd_71a083191c57423396f9a29f5f7cbf4a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/601d40ba-2ae2-48b9-b645-fbaf3544a64d/roginiwajofe.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/72787785027.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/rufido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c929b8-6c4a-4d49-9c32-74beec0b38c5/how_was_virginia_connected_to_the_brown_v._board_of_education_decision_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60548e7-59a0-44c6-bff1-78acf82efa65/cuisinart_air_fryer_convection_toaster_oven_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f122dc3f-dcc2-4e5a-b957-d433aa4bec87/delonghi_oil_heater_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1e41e3-195d-4900-8432-269c538854f5/99865024320.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A5 3116 bytes
SHA-256: ab9252eea08afa25b6237da9a9e043ad7d58d49ec17c35627607e7938b3ef9b9
font_01_sfnt_off000121cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CD 4944 bytes
SHA-256: 08eb13efdbd3aa62f2d3d21d46c387069ff8a6f80c4df50ebfe0f16f0964b306
font_02_sfnt_off0001329d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329D 11104 bytes
SHA-256: d26ca0630f831150e8a02aab41153ca2b6ae4cc00610a0a9e4051526880495c0
font_03_sfnt_off0001589f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589F 16876 bytes
SHA-256: 958753d3bdcc4b2a7abb43263c1a9284c7c945dd48689f3f6c88417badf3023d

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