PDF malware analysis — malicious · 67e3b3638397870e

MALICIOUS

PDF

139.3 KB Created: 2021-03-18 12:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: d4663d4aa27469f2e4dcf4dfabc2b843 SHA-1: 55dcc9b4dde8eadca90625eab0f502cda0a0297f SHA-256: 67e3b3638397870e4b015689653d6f4f0cd17c01f3f032c560e78eb840630581

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to a large number of PDFs. One of the primary external links, 'https://fokemale.ru/award?keyword=yoga+asanas+and+its+benefits+pdf', is suspicious and likely leads to a phishing or malware distribution site. The presence of embedded URLs and the ML classifier's high confidence score further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://fokemale.ru/award?keyword=yoga+asanas+and+its+benefits+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4469633/normal_5fe16ca6b8355.pdfIn PDF document text
- https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/8ae9511d3e17.pdfIn PDF document text
- https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/wiloki.pdfIn PDF document text
- https://tizonitiwu.weebly.com/uploads/1/3/4/7/134734793/7229e3dfeb2a9f.pdfIn PDF document text
- http://mezajozugabaso.getenjoyment.net/nupewukinisu.pdfIn PDF document text
- https://xelopapet.weebly.com/uploads/1/3/0/7/130775154/gamevede_zugej_xowib_linalup.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366959/normal_6031c813e4ca4.pdfIn PDF document text
- http://linefofaxugedu.mywebcommunity.org/10904365022.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501027/normal_5fe291fe28efd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444115/normal_601fd3703e8dd.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4384464/normal_5fdfabe2715ac.pdfIn PDF document text
- http://kudikadip.getenjoyment.net/sozamowubutoluvedapilu.pdfIn PDF document text
- http://lazokiwumemo.mygamesonline.org/65699958871.pdfIn PDF document text
- https://kesupegujofoju.weebly.com/uploads/1/3/5/3/135388852/f162f.pdfIn PDF document text
- https://popaxeras.weebly.com/uploads/1/3/0/8/130814769/bff88218.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://s3.amazonaws.com/goneduzum/bajovexomotubawegoz.pdfIn PDF document text
- https://s3.amazonaws.com/wiwuxot/atmega328p_au_datasheet.pdfIn PDF document text
- https://s3.amazonaws.com/piwupevivotixi/japan_travel_guide_with_me_app.pdfIn PDF document text
- https://s3.amazonaws.com/fifuto/lacrosse_projection_atomic_clock_instructions.pdfIn PDF document text
- https://s3.amazonaws.com/satedafadusizo/christmas_colouring_sheets_for_adults.pdfIn PDF document text
- https://s3.amazonaws.com/xeroguru/how_much_are_corgi_toy_cars_worth.pdfIn PDF document text
- https://s3.amazonaws.com/pavujiniz/cardium_formation_lithology.pdfIn PDF document text
- https://s3.amazonaws.com/zuxime/94711270612.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001be5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BE5E	5180 bytes
SHA-256: `c00f8254782dee0f0229981928ef738732797677eb24c2bdcec3361fbf853058`
`font_01_sfnt_off0001d011.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D011	3740 bytes
SHA-256: `814992be763021c11dca23fed22b8bb7a0f9688c8b5af2f3d58b36f318d7b63c`
`font_02_sfnt_off0001db8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1DB8B	12816 bytes
SHA-256: `809437b32224d240e578c4ba28ad1ade99d42f1ede113fdfa88714e1bce7daaf`
`font_03_sfnt_off000204e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x204E5	7572 bytes
SHA-256: `87fd51ba24706fb908e6825eefd4da0f435c97465aec6c5cf7cc0dbdf3a3611a`

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