PDF malware analysis — malicious · aa7686be3e77605a

MALICIOUS

PDF

86.3 KB Created: 2021-05-28 00:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: ed7bbaec647d8b811815f82dc2c353c7 SHA-1: 9779716e5fa51334d54cbc2df482d7844992ce01 SHA-256: aa7686be3e77605aaec380a836b2162c7a5fce4344c0ede0ca335b7d9b4e6cf6

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely exploits a vulnerability or attempts to trick the user. It contains a high number of embedded links, with at least one pointing to known malicious redirector infrastructure. The primary purpose appears to be directing users to a link farm, potentially for SEO manipulation or to serve further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
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 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.
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/strik?utm_term=vmi+cadet+handbook+2018 In PDF document text
- https://static.s123-cdn-static.com/uploads/4481825/normal_60021829c0397.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494681/normal_603bef401693c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501193/normal_5fed696fa8c3d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4499317/normal_60647c33084ed.pdfIn PDF document text
- https://gabudusufixojur.weebly.com/uploads/1/3/5/3/135339303/taroxo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476010/normal_60297f5d52b4b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427523/normal_5fea02b836885.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450434/normal_60316edd08ca2.pdfIn PDF document text
- https://dezekebewefe.weebly.com/uploads/1/3/4/7/134731304/6768050.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388169/normal_6032e46639b7e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449615/normal_5fdc152b72cc3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4394079/normal_605d4d8504f5b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496153/normal_6038930f22bf7.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://uploads.strikinglycdn.com/files/a8d690b4-9062-439b-8a79-0b4c3ac2d1cb/mejomufewesuxinuzajataz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/00b1c776-63fc-4498-8cfb-ccd2aaf22039/.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bf4f7b3d-4705-454b-a8c7-e8350589bf36/how_much_ram_can_a_dell_optiplex_760_hold.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/537fe860-f403-40c0-8679-7fd03324c416/98139609113.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/57ec53e3-1ce1-4e6f-81ae-76406a84c2b0/molitininafol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5cb6c707-48a1-4cc0-9ceb-2062172f1f9b/vba_programming_in_excel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0915fd6a-0452-46cd-847c-338c978fdbae/letra_de_cancion_cristiana_gloria_en_lo_alto.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_off00010523.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10523	5348 bytes
SHA-256: `81338c0077a16ddbc0dc798c6f192964324f6f8e8516816665f74f14ae25b161`
`font_01_sfnt_off00011721.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11721	11464 bytes
SHA-256: `e89ebfed25c4b8855506a5f37e6af8d83d401408eb7525c3daced4c96c72b8b0`
`font_02_sfnt_off00013e24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E24	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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