PDF malware analysis — malicious · 78c4f8ddaedc88cd

MALICIOUS

PDF

76.4 KB Created: 2021-03-22 08:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: ab50a57e8b0ac3e8a5ec1c2c198b25a3 SHA-1: bbae214378f51a32e67526c8aa49521959145047 SHA-256: 78c4f8ddaedc88cd8a5f9ba3a7b2aeababfd08d846412eeb966e4e6a7c69e026

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious sites, potentially leveraging PDF vulnerabilities or social engineering.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://yafferge.ru/wix?keyword=ming+cho+lee+awards In PDF document text
- https://cdn-cms.f-static.net/uploads/4486215/normal_5fd8cd6aa9575.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450037/normal_602afbed06c0c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417534/normal_5ff9e66e072f8.pdfIn PDF document text
- http://kraftmann.su/dufaziuq0jy.pdfIn PDF document text
- http://tugrull.com/83803225880cpnk0.pdfIn PDF document text
- https://kerozusokenizil.weebly.com/uploads/1/3/1/3/131383247/100206.pdfIn PDF document text
- http://fherixq.com/lejidivojosazawekibobo73ex7.pdfIn PDF document text
- http://trysol.xyz/build_.net_core_with_jenkins7nm88.pdfIn PDF document text
- https://nekekijubexofus.weebly.com/uploads/1/3/4/5/134587401/nedutisugesube_pemire.pdfIn PDF document text
- http://1xbet-regi.site/wels_catfish_fishing_near_me0livn.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416493/normal_601295f1f20c9.pdfIn PDF document text
- https://nitogufufuwal.weebly.com/uploads/1/3/3/9/133997090/lalegeropitukiti.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370064/normal_5ffa5b8e5c9e4.pdfIn PDF document text
- http://petersikdar.com/jewuzofomomosotad1rzpa.pdfIn PDF document text
- https://biwusegunaji.weebly.com/uploads/1/3/4/0/134096831/ziwosetegubared_sovizuwepevu_zezaw_fufaraxozokojor.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408195/normal_5fe6e571a416a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366956/normal_5fc7b62826fa8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jafujasiwetid/excel_document_inventory_template.pdfIn PDF document text
- https://s3.amazonaws.com/tufitijinexu/64772396997.pdfIn PDF document text
- https://s3.amazonaws.com/bidivo/fender_frontman_212r_champion_100.pdfIn PDF document text
- https://s3.amazonaws.com/sosupejuxofedo/bomber_friends_free_for_pc.pdfIn PDF document text
- https://s3.amazonaws.com/nokiva/rabovilaxejirivizuz.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d674.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD674	5296 bytes
SHA-256: `ef1bb69ec9a78d2b2b8a3e559095105a38080a8ad4f357440619d68dfb39983c`
`font_01_sfnt_off0000e895.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE895	10516 bytes
SHA-256: `b623cc1ff88afd75f9fb02ca2ffb91aaed1468256c0578a89a5cafefaf31b64b`
`font_02_sfnt_off00010cf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CF3	16884 bytes
SHA-256: `58c30d0219ec48fac89b111d2add694e9d3607950caf676fa08187263d5a88dc`

Open this report in the interactive analyzer, or submit your own file for analysis.