PDF malware analysis — malicious · 12c15298b8baed2e

MALICIOUS

PDF

73.7 KB Created: 2021-05-25 15:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: efe6604b1652d1cf7548a1c13ca6ff3d SHA-1: 7a09717ecf571cbcb10a94d5f0d222fffcf64f73 SHA-256: 12c15298b8baed2eb6eda83ce261f779bc9ea5c57b597192ebd4810179db1198

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The primary URL, 'https://maypoin.ru/strik?utm_term=firex+120-538b+replacement', suggests a lure related to a product replacement, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://maypoin.ru/strik?utm_term=firex+120-538b+replacement PDF link annotation
- https://solugelefeko.weebly.com/uploads/1/3/0/7/130740562/4210758.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4403561/normal_5ffa697f952fd.pdfIn PDF document text
- https://pukexomupuko.weebly.com/uploads/1/3/1/1/131164185/ferifetelal.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427273/normal_605bbab7e6a4b.pdfIn PDF document text
- https://mixifomako.weebly.com/uploads/1/3/1/1/131164472/7f5b14f501926.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447097/normal_602973362923a.pdfIn PDF document text
- https://kodidenub.weebly.com/uploads/1/3/4/3/134328035/wilemopered-dimek-gefigaguwev-suzolisulel.pdfIn PDF document text
- https://jesomufufasak.weebly.com/uploads/1/3/1/8/131872286/8486970.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379363/normal_604e302357243.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392451/normal_6048c1accf8ee.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4409796/normal_5fec1d022ba46.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470385/normal_601e1bfa16f2f.pdfIn PDF document text
- https://tebozelekunoton.weebly.com/uploads/1/3/1/4/131453588/5e7e4e21e1e8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492294/normal_60404cd22b250.pdfIn PDF document text
- https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/545d44f.pdfIn PDF document text
- https://setowunujabid.weebly.com/uploads/1/3/4/0/134095848/gituxosipulu-fasapugutegav-fajukideju.pdfIn PDF document text
- https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/bazob.pdfIn PDF document text
- https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/luxewawubupax_dudiko.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464080/normal_6004b1191cfa5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4499319/normal_606dbd87c4a17.pdfIn PDF document text
- https://suzujiwome.weebly.com/uploads/1/3/0/7/130776055/c3a8569b23.pdfIn PDF document text
- https://wubudonujekud.weebly.com/uploads/1/3/4/5/134524452/1241258.pdfIn PDF document text
- https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/nerefikutapetete.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/wutisigila/vigozegulizunikowok.pdfIn PDF document text
- https://s3.amazonaws.com/moduxanakuri/picsart_gold_yearly_free_apk.pdfIn PDF document text
- https://s3.amazonaws.com/bidivo/amped_wireless_extender_setup_sr10000.pdfIn PDF document text
- https://s3.amazonaws.com/labitajaxatufib/51490046453.pdfIn PDF document text
- https://s3.amazonaws.com/legapatatezisa/68685878203.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_off0000d378.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD378	5584 bytes
SHA-256: `440491fbe6f8312016e2052e81b2457d3957869af9b7261791c1285c182d8eba`
`font_01_sfnt_off0000e654.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE654	10676 bytes
SHA-256: `c914c1306337fa269764bcb5ec9b73f81e02e489e7bef05129ebee3ef6436aaf`
`font_02_sfnt_off00010ac6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AC6	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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