PDF malware analysis — malicious · e3270e49a55e0781

MALICIOUS

PDF

78.6 KB Created: 2021-05-30 00:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 4569c3f53da4935eb3ec05a32f70dd38 SHA-1: d114f24014bcf8cdf8c6de6e3ca5142fd755a4f9 SHA-256: e3270e49a55e0781421987dc4864a9d7ee217ced8564efaca7ff5a8bcfa24247

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, forming a link farm. The primary URL, https://baarspo.ru/123?utm_term=dha+bwp+form, suggests a potential phishing or scam lure. No scripts were extracted, but the PDF structure and link farm indicate a common tactic for distributing further malicious content or leading users to phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

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.
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
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://baarspo.ru/123?utm_term=dha+bwp+form PDF link annotation
- https://jolevodib.weebly.com/uploads/1/3/1/6/131636654/903264.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388617/normal_604668d67c007.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414174/normal_60394b843cb5a.pdfIn PDF document text
- https://zeleveruki.weebly.com/uploads/1/3/4/8/134898901/vovagevanivik_delafoz_zenepez.pdfIn PDF document text
- https://vidisuxusa.weebly.com/uploads/1/3/1/6/131606291/1661417.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455642/normal_605c0dfb80b2a.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4459482/normal_60b2b1bbe978a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457604/normal_600ae75a41ce2.pdfIn PDF document text
- https://nozezezolakufu.weebly.com/uploads/1/3/2/6/132695232/e2312993106aa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475383/normal_604cfd9778179.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496571/normal_5ffe4cd778350.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456140/normal_6014f5cb2d044.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415292/normal_6010d949204d9.pdfIn PDF document text
- https://faluwesidiji.weebly.com/uploads/1/3/0/7/130738597/donitopesafejepemofi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453134/normal_60583d790240b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448536/normal_60297e5d7990e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410703/normal_6054325a07fb4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386824/normal_606765f9f3787.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/d734b0eb-318a-4562-8aab-9b25131f246f/romeo_and_juliet_paragraph_writing_prompts_act_1_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5471e977-7ffb-4c2f-a798-0f488234bf94/5621493707.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a9c95aee-4ddd-453c-b642-7067e1ef412d/30244376283.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df1e02f4-030c-4859-9178-2e9a236ad6f1/newborn_baby_girl_dresses_amazon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/656140ad-9ff9-43c1-b764-56f02387f2bf/student_information_sheet_for_teachers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/457a5adf-4f35-4f22-b4c1-15d141439449/58338284972.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
`stream_004_off0001104a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1104A	17900 bytes
SHA-256: `07e7c2400c292e024cd022f9b7fdcffa5b2bd461d44c8bdcd28f8a0156acd219`
`font_00_sfnt_off0000d8ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8AB	5164 bytes
SHA-256: `a6f2666b10e20776e6cef053a870c459afcba29b5282d14f316d200f67d47417`
`font_01_sfnt_off0000ea26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA26	11132 bytes
SHA-256: `13b4f32f642ea5176a92c9b6584605ff08d725bfb419c9b34395f9059e4044d6`

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