PDF malware analysis — malicious · 1394ddaf0428ff84

MALICIOUS

PDF

133.8 KB Created: 2021-03-16 19:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3a9c5d5b4ee2850a38929ebba9bf60ff SHA-1: 51952bd485cfc5c6e045c89ccfe51f14144cfc8b SHA-256: 1394ddaf0428ff8493ff790e9b91385f307589de4768ad1ee4197edf27c84771

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for SEO poisoning or distributing malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and one of the primary URLs suggests a lure related to 'dna replication model activity answers'. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely to redirect the user to a site hosting further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9299

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
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://golowaki.ru/wix?keyword=dna+replication+model+activity+answers
- http://sandiego-podcasts.com/3633205069258oig.pdf
- https://cdn.sqhk.co/wogesowive/ji2jgSw/28207170433.pdf
- https://cdn.sqhk.co/xumesapaxoku/hjiYGhi/gidobulafojutopojikutum.pdf
- https://gezedasi.weebly.com/uploads/1/3/1/3/131378850/583ae0f046e9d29.pdf
- https://cdn.sqhk.co/lofesaxudiwo/Yiig9qg/wuniwexoxogexareledeva.pdf
- https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/8964447a.pdf
- https://cdn.sqhk.co/votojuxosaf/66p7154/hello_neighbor_act_1_basement_generator.pdf
- https://tunawirivam.weebly.com/uploads/1/3/1/4/131437064/4297418.pdf
- http://ladekepevij.mygamesonline.org/fundamentals_of_astrodynamics_and_applications_vallado_download.pdf
- http://kopalirigel.mypressonline.com/budav.pdf
- https://cdn.sqhk.co/podoxato/tidwhjM/xuvija.pdf
- http://nafarami.medianewsonline.com/how_much_does_it_cost_to_change_transmission_fluid_in_a_car.pdf
- https://josuriwomevopi.weebly.com/uploads/1/3/4/7/134769094/gudevode-mekowij-dudopamoxexotik.pdf
- https://metolokinazez.weebly.com/uploads/1/3/1/4/131452743/fewemejameleb-guwiwosekobi.pdf
- https://cdn.sqhk.co/sirijunubi/ebhihd2/pimerivanupizigevu.pdf
- https://bategasef.weebly.com/uploads/1/3/2/7/132712490/c37cef8458c589f.pdf
- http://evatopshop.xyz/regogoviris4qyig.pdf
- http://health2health.online/facebook_graph_api_documentationpu4x8.pdf
- https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/jikujanibeloge.pdf
- https://cdn.sqhk.co/mavozopofug/gjifihP/pokemon_go_ipad_wallpaper_hd.pdf
- http://benilobodereji.mygamesonline.org/bowinoruxawuvuravosuwuri.pdf
- https://cdn.sqhk.co/zalopubid/najiigf/runnings_claremont_nh_03743.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- http://gosaduzunake.myartsonline.com/2788490013.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
- https://savannah.gnu.org/projects/freefont/
- http://www.gnu.org/licenses/
- http://www.gnu.org/copyleft/gpl.html
- http://scripts.sil.org/OFL

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_008_off0001d088.bin` `4d7387c28db482c8d66afbc4002667a6857bb60489e8624ae516238131f9eebe`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D088	17112 bytes
`font_00_sfnt_off000158e8.bin` `3cd1abb8e06b546264a8e828936351abdf63bec20798e1c340df9be95ef86bd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x158E8	6732 bytes
`font_01_sfnt_off0001699a.bin` `6f8af29e1396d9869784717a452924b83b0259e2e95e61f1027340bcacde9e5b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1699A	4808 bytes
`font_02_sfnt_off00017a6a.bin` `adeb98842e835a6408b1d862163a44518101abe6bc0dedf2c372ed86e1017cff`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17A6A	5260 bytes
`font_03_sfnt_off00018c3f.bin` `eb1583c7e5aef28bb8b856c3c02bbe266ee7829b7426de10822fa219bfe5e1ad`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18C3F	2080 bytes
`font_04_sfnt_off00019610.bin` `7b02c384532de2e5d305d8bb9d25a2074499902acf79d37c02ef01170188e377`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19610	18728 bytes
`font_06_sfnt_off0001e931.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E931	4324 bytes
`font_07_sfnt_off0001f6f3.bin` `e23fbb84d217718d29109273afe77fb69be5aa21e28bf32197b706ba08bc7b3b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F6F3	6208 bytes

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