PDF malware analysis — malicious · 2aac7fbb64b83b1e

MALICIOUS

PDF

85.6 KB Created: 2021-05-23 11:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 5d30775923ecdc8bf06d1037ac393ee2 SHA-1: 33d2eea024cdf7a4db8d682f2b292df7768df8df SHA-256: 2aac7fbb64b83b1edc8d7eeb4f72ab4eb1c1d6a070dffdda357866e7b43f44bc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, https://druttle.ru/strik?utm_term=my+name+by+sandra+cisneros+excerpted+from+the+house+on+mango+street, is directly embedded in the document's URI. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution through these linked documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/strik?utm_term=my+name+by+sandra+cisneros+excerpted+from+the+house+on+mango+street PDF link annotation
- https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/musalibaluzilixunij.pdfIn PDF document text
- https://negowuvezesat.weebly.com/uploads/1/3/4/8/134859399/480ac547b.pdfIn PDF document text
- https://kijiwutexaji.weebly.com/uploads/1/3/4/6/134698992/sewabaki-jewefuf.pdfIn PDF document text
- https://jadilibetaz.weebly.com/uploads/1/3/4/8/134871175/jikeri.pdfIn PDF document text
- https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/91094.pdfIn PDF document text
- https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/ginupoxilaxu.pdfIn PDF document text
- https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/tijatujufoveb.pdfIn PDF document text
- https://zapamapat.weebly.com/uploads/1/3/0/7/130775391/sekomubod.pdfIn PDF document text
- https://fugogifozu.weebly.com/uploads/1/3/4/8/134888696/4414049.pdfIn PDF document text
- https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/91a7bdbe16ea40.pdfIn PDF document text
- https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/ed31be.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/wuniku/karambit_fade_pattern_guide.pdfIn PDF document text
- https://s3.amazonaws.com/rogugagatuf/tamil_amman_remix_audio_songs.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8e666ad7-0e24-454b-adfd-5fb8c9698e54/passato_prossimo_o_imperfetto_a2.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bdb75808-59d4-44b3-b743-e0dd395a7b40/wekabavikesiwoluzodizap.pdfIn PDF document text
- https://s3.amazonaws.com/teximikamukubo/18760515438.pdfIn PDF document text
- https://s3.amazonaws.com/gazijewevan/serta_motion_plus_adjustable_base_headboard_brackets.pdfIn PDF document text
- https://s3.amazonaws.com/gazijewevan/79100589954.pdfIn PDF document text
- https://s3.amazonaws.com/luborinizu/wejofajazobuvijonijokiviz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/88d3916c-f692-469e-92bf-c32aa0f7625c/haier_14000_btu_portable_air_conditioner_canada.pdfIn PDF document text
- https://s3.amazonaws.com/tujeviwakirawu/life_forms_in_the_proterozoic_eon.pdfIn PDF document text
- https://s3.amazonaws.com/bezutu/walking_dead_graphic_novel.pdfIn PDF document text
- https://s3.amazonaws.com/rawesaragegugar/84247609087.pdfIn PDF document text
- https://s3.amazonaws.com/zibenoroduzuw/minecraft_server_1._8_8_free.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010158.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10158	5736 bytes
SHA-256: `00f5c22530462720a32e3206fca238ca78122f8d65604b08c483d6ad9341fa84`
`font_01_sfnt_off000114a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114A7	10996 bytes
SHA-256: `5d4b9a1ca5fe9ba53d4eacd5264b14ce8bbfdeab3821ec9c9ee03b4c1be29e7d`
`font_02_sfnt_off00013a07.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A07	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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