Malicious PDF — malware analysis report

Static analysis result for SHA-256 addd673208c7913f…

MALICIOUS

PDF

75.5 KB Created: 2021-03-19 17:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e64d3198447927d1b71ef16f3edc0423 SHA-1: f1dea3262058647a4135bcdc37d0104a75b0d976 SHA-256: addd673208c7913f9d1c697d10b1a8dc4cb218955718da1c62796b298240765f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://bologen.ru/strik?utm_term=integrated+chinese+level+1+part+2+traditional+pdf PDF link annotation
    • https://savejesala.weebly.com/uploads/1/3/4/6/134668282/jidogelix.pdfIn PDF document text
    • http://peroruse.iblogger.org/gynecology_ultrasound_report.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/jupuvubunuw.pdfIn PDF document text
    • https://titugujogimob.weebly.com/uploads/1/3/4/0/134017720/3902950.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/66140056018.pdfIn PDF document text
    • http://tolofat.22web.org/17292956580.pdfIn PDF document text
    • https://kogexabisuzim.weebly.com/uploads/1/3/4/3/134322867/legomon.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
    • http://sunefosopibe.rf.gd/zozarupavulaxibidek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7faf9f7c-cfc7-4525-8743-5a1fb7570348/12425984713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e671a4-150e-4ad9-b0f9-60b0f34f3b51/how_to_get_certified_in_dog_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7532fa4-208e-402c-9554-2c00d34a3faa/62181654722.pdfIn PDF document text
    • http://banobozibijur.epizy.com/70487858785.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/how_to_pair_2_jam_double_down_speakers.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/medical_report_format_for_students.pdfIn PDF document text
    • http://resifidivef.epizy.com/44054685728.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/77232133887.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/xuxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b66675e7-a2a9-4ea1-ac92-9a975b10a0b6/62428713275.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/mavuvopaz.pdfIn PDF document text
    • http://gafibis.epizy.com/how_to_reset_maintenance_light_on_2012_camry_se.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/tell_me_about_yourself_best_answer_for_college_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/gijobawaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/netflix_op_usb.pdfIn PDF document text
    • http://teposekif.epizy.com/ashcroft_pressure_gauge.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_off0000d99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99F 5384 bytes
SHA-256: 703a34531c4f54f3552770d2df11e2ea4e20efd9f57575cc09cf0580e5192dc7
font_01_sfnt_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 10620 bytes
SHA-256: 4ee8d1377b7c3c6c77e51db12c23251a20a0ce05def50a8a4937eca33ce99b23
font_02_sfnt_off00010fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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