Malicious PDF — malware analysis report

Static analysis result for SHA-256 4343a4b4025edf91…

MALICIOUS

PDF

66.6 KB Created: 2021-04-13 08:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e800362a05a0a5cbb1634bf175731f39 SHA-1: b7c7f5a65cc32914fe883c3f626202bbca9c7b94 SHA-256: 4343a4b4025edf916be07211f4f912f5b9bcf1cbfc8a88ef393e37d6d44d80c2
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malicious content or phishing pages. The presence of external URIs and link farm heuristics points towards a tactic to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7207

Heuristics 5

  • 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.
  • 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 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
  • 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://druttle.ru/strik?utm_term=john+deere+110+tlb+seat
    • http://xuxodowenam.getenjoyment.net/best_reader_for_android_free.pdf
    • http://evgeniy-semenenko.ru/xoxanisisijutenobuyhfnm.pdf
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/suwadabig.pdf
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/sawotekav-nugesimajowafe-mujil.pdf
    • http://kewokuxumuzig.medianewsonline.com/children_s_songs_chords.pdf
    • https://vebipebetas.weebly.com/uploads/1/3/4/0/134012388/3e7d153bfb410a.pdf
    • http://bimadepunepi.mypressonline.com/monaxejumisusejazili.pdf
    • http://karaulovlife.site/letanezenetokotejiw7aenh.pdf
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/486e68bf9.pdf
    • https://nowimadowa.weebly.com/uploads/1/3/4/7/134705132/3658415.pdf
    • http://bestunew.xyz/berserk_manga_deluxe_edition_volume_2o4md6.pdf
    • https://dudobafileziv.weebly.com/uploads/1/3/5/3/135331993/ponus.pdf
    • http://merovew.xyz/70150425298kyxfq.pdf
    • http://fegokodelaxen.scienceontheweb.net/xakumamipabuzof.pdf
    • https://pimejowutaviju.weebly.com/uploads/1/3/4/4/134495028/kutigorutej_jemeri_jijeno.pdf
    • https://niraxonaweza.weebly.com/uploads/1/3/4/0/134000156/9815715.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_8ffaf582f13744758391566c32de80a8.pdf?index=true
    • https://7ce190f9-fb8d-496c-a51a-ce151dcc024a.filesusr.com/ugd/e72def_294e9b3b939a4d768fc7264b9eda3141.pdf?index=true
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_53a4e8d775074ebab0e0185ad5e57887.pdf?index=true
    • https://c4a0f302-b060-43a0-af10-a0364da5eca7.filesusr.com/ugd/c6d327_7db3b35f1fc844d5b37ba70b38e32ea0.pdf?index=true
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_b599215513584296a153194188b95962.pdf?index=true
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_d983b20b007a4c599e595bcf7562812e.pdf?index=true
    • http://xovolefewawex.atwebpages.com/zasipof.pdf
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_4c78529a7fa04718b7761a835ad325dd.pdf?index=true
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_5b37966817574a0399eacbe61f07dab0.pdf?index=true
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_ef2477d36e6e42e5b8da047fd5e95483.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a5.bin
4b9db5a4081c7f0e2465c4e19123721777e3dea80f3dfd6cde6952e2e5844303		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A5 4976 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.