Malicious PDF — malware analysis report

Static analysis result for SHA-256 12906cd903e10284…

MALICIOUS

PDF

77.9 KB Created: 2021-05-08 16:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 67df4a0234e44cc74454a139e7702b42 SHA-1: aaa13d4cda79258e1430a19a194c670e55762abb SHA-256: 12906cd903e10284af5915e24b97f7e76236c0b947d435ac09f1eb317aa68e41
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://jacksth.ru/strik?utm_term=how+to+make+normal+distribution+table+in+excel PDF link annotation
    • https://titugujogimob.weebly.com/uploads/1/3/4/0/134017720/pibobazizujop.pdfIn PDF document text
    • http://medyayazilimtr.com/genius_scan_-_scanner_reviewa5rmi.pdfIn PDF document text
    • https://jifemeput.weebly.com/uploads/1/3/4/3/134398411/5732708.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/digurusumevenuj.pdfIn PDF document text
    • http://meinekarten.best/whats_the_best_hcg_drops_to_buyup18j.pdfIn PDF document text
    • http://hellesypakk.online/nikedewewenaduriz63wgo.pdfIn PDF document text
    • http://gaydating.world/android_notification_icon_showing_white_squaremoom6.pdfIn PDF document text
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/laxuf.pdfIn PDF document text
    • http://scandisvet.ru/jomakisluz3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rufujomuxa.epizy.com/fotunat.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/88918211727.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_300f7256fabf4cadbc00f1a0a2b3e994.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a20174-9300-40dc-851a-47e35acfad60/cordelia_fine_delusions_of_gender_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce2bd4ba-01c0-4679-a7f0-a7add7ed0f2a/how_to_say_el_pollo_loco.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/3179201486.pdfIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_0f8ccf7eb2c945c08d61dddc0787e2b2.pdf?index=trueIn PDF document text
    • http://kebewuf.rf.gd/modiwekosij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98af9177-fd9e-47ad-b551-dbd9ab856b95/local_area_network_lan_settings_windows_10.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_104ac25e23d8439787768a9459ec4c24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78120725-a836-4357-b025-84c0f9bceb28/78329724123.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 5408 bytes
SHA-256: 90a7e4c65680aeb097e44357c5f82708e803ab20e3abc056f9be50379771a689
font_01_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 10776 bytes
SHA-256: 3683bfc8272510d7ddd85d05b2c7690f296da41fe64d2e97601ed705108010a3

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