PDF malware analysis — malicious · be7ced9c38c22a6b

MALICIOUS

PDF

87.9 KB Created: 2021-05-25 08:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: f3f3f136bcdc00164300a5da2531cb07 SHA-1: 838093185533a55090de879ae257c42ad67e6f27 SHA-256: be7ced9c38c22a6bf49bb209a82d301ef74331f3c62184a4967ace74bb48aef6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm with numerous external URLs. The primary malicious URL, https://seumenha.ru/strik, is likely used to distribute further payloads or lead users to phishing sites. The document body, though heavily obfuscated, suggests a lure related to 'codes for 2 player superhero tycoon 2021', indicating a potential social engineering tactic.

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://seumenha.ru/strik?utm_term=codes+for+2+player+superhero+tycoon+2021 PDF link annotation
- https://mexarufuwusa.weebly.com/uploads/1/3/4/5/134599415/votenagimuda-gevewa-lewevinudedo.pdfIn PDF document text
- https://buxijabis.weebly.com/uploads/1/3/5/3/135329720/33e3af.pdfIn PDF document text
- https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/buditiwaputas_vegigujujati_jonawuxux_benakaxunemesed.pdfIn PDF document text
- https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/kanejiwixokal.pdfIn PDF document text
- https://gukabezifom.weebly.com/uploads/1/3/6/0/136051166/88e45c73de0ffa.pdfIn PDF document text
- https://gexuxufe.weebly.com/uploads/1/3/1/4/131406387/fogakegirekop.pdfIn PDF document text
- https://winofugunolef.weebly.com/uploads/1/3/4/8/134846497/jutakudug_vojedenexi_bomerapofobal_xisukizave.pdfIn PDF document text
- https://digutejuwunapon.weebly.com/uploads/1/3/5/3/135325267/4775669.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454421/normal_602d2eed0c3f5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428054/normal_600f9e862f39e.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://s3.amazonaws.com/gofilafixu/i_am_a_pirate_violin_sheet_music.pdfIn PDF document text
- https://s3.amazonaws.com/kalanejaxutilif/inventory_management_templates_in_excel.pdfIn PDF document text
- https://s3.amazonaws.com/loranoduzuja/family_therapy_definition_according_to_who.pdfIn PDF document text
- https://s3.amazonaws.com/votubukaxogilix/piguvobuvujazal.pdfIn PDF document text
- https://s3.amazonaws.com/bipepezuwed/how_to_setup_call_forwarding_in_airtel.pdfIn PDF document text
- https://s3.amazonaws.com/sowirutelevolur/19501645131.pdfIn PDF document text
- https://s3.amazonaws.com/fadedosi/52327558567.pdfIn PDF document text
- https://s3.amazonaws.com/toniseligiwuzux/sjcam_sj4000_manual.pdfIn PDF document text
- https://s3.amazonaws.com/jefazaxal/the_end_of_dieting.pdfIn PDF document text
- https://s3.amazonaws.com/tawovojo/the_passionate_shepherd_to_his_love_and_the_nymphs_reply_to_the_shepherd_compare_and_contrast_essay.pdfIn PDF document text
- https://s3.amazonaws.com/lodazojamuva/letimodakavojemete.pdfIn PDF document text
- https://s3.amazonaws.com/jiguwuzobozobaz/list_of_synonyms_words_in_english.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f139.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF139	5528 bytes
SHA-256: `d66ef1e8991a40baa33692765f1bcfa85419f06ae2943406d3758f77f5f78949`
`font_01_sfnt_off0001040b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1040B	10796 bytes
SHA-256: `c0ee39be072798e6768b2df39b48d8b2eb1f2c0c8d821b4281b89e25e6f4c0c9`
`font_02_sfnt_off00012913.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12913	17112 bytes
SHA-256: `8d931078a8bda077e62b6226989e9ca7a204b5b2ded984cec863dfc844f848f3`
`font_03_sfnt_off00014178.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14178	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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