PDF malware analysis — malicious · de2c333d9d75a325

MALICIOUS

PDF

126.1 KB Created: 2021-03-26 01:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8e061d1b4615787eb083042519a0cc86 SHA-1: e24de507eec377fd3cfda1c688706e0634a2c5cc SHA-256: de2c333d9d75a325b028584f8caeba573bd4773560f4772ab6d259669f9bb816

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical alert for a PDF link farm and a machine learning classifier indicating maliciousness. ClamAV also identified it as a phishing trojan. The presence of numerous external links, particularly to maypoin.ru, suggests a phishing or SEO spam campaign. Although no scripts were directly extracted, the PDF structure and link farm heuristic point towards malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://maypoin.ru/123?utm_term=at%2526+t+tv+channel+guide+u300
- https://static.s123-cdn-static.com/uploads/4380393/normal_5fdf68a4150ac.pdf
- https://rupokolox.weebly.com/uploads/1/3/0/8/130813141/zuvevolebeletizin.pdf
- https://static.s123-cdn-static.com/uploads/4419192/normal_5fdf11b677b80.pdf
- https://wegakerovosa.weebly.com/uploads/1/3/0/8/130873826/7804480.pdf
- https://letateworu.weebly.com/uploads/1/3/4/3/134365764/06c983c1b.pdf
- https://sanijala.weebly.com/uploads/1/3/4/8/134889677/figove.pdf
- https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/2715001.pdf
- https://radamokugek.weebly.com/uploads/1/3/2/6/132696621/3263872.pdf
- https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/tudiwipi-jotuzadeluras.pdf
- https://zodekunomaxuj.weebly.com/uploads/1/3/0/7/130739112/2693047.pdf
- https://static.s123-cdn-static.com/uploads/4413368/normal_5ff46d732726a.pdf
- https://static.s123-cdn-static.com/uploads/4465930/normal_5feb47f125587.pdf
- https://melugazeso.weebly.com/uploads/1/3/1/1/131164252/fawefetaloguxe-wovabazalo.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_2fb69d93c0a0497a8ea3df716dc64dbf.pdf?index=true
- https://uploads.strikinglycdn.com/files/31d2c9df-e937-4b15-a57e-3f83b4b467b1/if_this_is_a_man_google_books.pdf
- https://99ca13e2-8bf0-45b2-93fa-bbfb519f101f.filesusr.com/ugd/5392be_c3f5cb4b06e04077a6e4c070fce34068.pdf?index=true
- https://uploads.strikinglycdn.com/files/65c50562-b24e-4d29-82e6-598943a59798/sukuvigebilaf.pdf
- https://uploads.strikinglycdn.com/files/96a933de-5e34-4439-81f0-11c98ed44e23/how_to_pair_swann_wireless_camera.pdf
- https://uploads.strikinglycdn.com/files/95653d2d-06f3-44a6-b248-69f963053928/xejorexatabunikajob.pdf
- https://uploads.strikinglycdn.com/files/fb7253c2-12a7-439b-86d4-9d22082d3727/pebaluratokatitaji.pdf
- https://uploads.strikinglycdn.com/files/8de273be-c0eb-4bbb-8e08-ba2d3bd3c3f0/ingenuity_inlighten_2-in-1_cradling_swing_review.pdf
- https://uploads.strikinglycdn.com/files/0392dc4c-0d2c-45a0-9295-952231202194/vefefolug.pdf
- https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_1984d454fa7d418ab8c3bd305d9218cd.pdf?index=true
- https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_09a5e1a4dd2e4ba08f1ffc3e836a2662.pdf?index=true
- https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_45b4ec91f805478badf00f7ab869b0b8.pdf?index=true
- https://uploads.strikinglycdn.com/files/5c28d0e7-d852-4134-a6d7-366ad41963d1/convertir_milesimas_de_pulgadas_a_milimetros.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://scripts.sil.org/OFL
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001633d.bin` `42bba7f5272f7ca2f34b6361075f1925d8c8af573df54edadd20ac26539ea8c2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1633D	7260 bytes
`font_01_sfnt_off00017c04.bin` `b5c1bb37bc67a10175673d8add07a47736101b1af0b60fb6bf32e713008d04ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17C04	4144 bytes
`font_02_sfnt_off00018a27.bin` `fef4647a43888bb409c71d525af1e1527d3c3d10f9e9a0ca52744f1ce7e3eb2a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18A27	21964 bytes
`font_03_sfnt_off0001c998.bin` `3fbb4dbbf2cfd0e90b58eb7781499fa28f7a38fe2009e732c26ba1dc0430e802`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C998	19384 bytes

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