PDF malware analysis — malicious · f8e53c16afe0deae

MALICIOUS

PDF

74.6 KB Created: 2021-05-21 15:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ccb8d0c797eb4f8314aefb171257e64f SHA-1: c002c4797369185be6f2353fe13be770c5da6439 SHA-256: f8e53c16afe0deaeb648c3a52dfa6875652c66a4b5e0525a8971e1307fadde96

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, characteristic of a link farm, designed to obscure the ultimate destination of malicious content. The presence of a URL related to "my singing monsters hacked apk 2021" suggests a lure for potentially unwanted or malicious software. ClamAV detection and ML classification strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://zajinet.ru/strik?utm_term=my+singing+monsters+hacked+apk+2021 PDF link annotation
- https://larofumizedewep.weebly.com/uploads/1/3/5/3/135326757/pegub_joxazisaxurop.pdfIn PDF document text
- https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/413690.pdfIn PDF document text
- https://fozibopabedabe.weebly.com/uploads/1/3/6/0/136082219/zodedanuxamidonipi.pdfIn PDF document text
- https://tazififodokufu.weebly.com/uploads/1/3/0/7/130776891/manibeduxaxowolot.pdfIn PDF document text
- https://bobazuforabi.weebly.com/uploads/1/3/1/4/131452976/pimoki.pdfIn PDF document text
- https://gopufijubasid.weebly.com/uploads/1/3/1/8/131856987/5995396.pdfIn PDF document text
- https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/venamujaw-sozufalu-bidozulup.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/viromibukoleliw/tipusipitupukevalapobefe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7031f0c6-102c-4f4e-99ff-a1d170263ce3/darasudutabokuwade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7892816d-f91c-4204-959e-34954b4a2d8e/kusorinogagakawevirar.pdfIn PDF document text
- https://s3.amazonaws.com/boxujetanonikuv/83971694331.pdfIn PDF document text
- https://s3.amazonaws.com/silubebebefuju/adobe_reader_9._3_2_free.pdfIn PDF document text
- https://s3.amazonaws.com/tibanepoxilibud/76876392244.pdfIn PDF document text
- https://s3.amazonaws.com/jazamerijekufol/cidco_online_lottery_application_form_2018.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0695a954-a317-4fc4-b8b1-7d3c2337e45c/venirupan.pdfIn PDF document text
- https://s3.amazonaws.com/gofilafixu/gixoju.pdfIn PDF document text
- https://s3.amazonaws.com/radubozufiwo/ariana_grande_focus_mp4.pdfIn PDF document text
- https://s3.amazonaws.com/labitajaxatufib/the_count_of_monte_cristo_actors_2002.pdfIn PDF document text
- https://s3.amazonaws.com/lunojol/68805453856.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dabba039-953f-48a0-834d-2da750faf2f7/tamosuz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9de9dcf8-14d5-495c-9c2d-74a9c804c3b6/71578232707.pdfIn PDF document text
- https://s3.amazonaws.com/vavejijitatofu/what_increases_blood_pressure_short_term.pdfIn PDF document text
- https://s3.amazonaws.com/fixararololu/how_many_battles_did_ancient_greece_win.pdfIn PDF document text
- https://s3.amazonaws.com/fifomi/tenuzuroziwudeloroforifub.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e3c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3C5	5952 bytes
SHA-256: `af5811966ff57e17256c1b7b12be6e9a1dd4baae22357e5533ec2bb77c4582ba`
`font_01_sfnt_off0000f7f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7F9	10268 bytes
SHA-256: `2cc6cfa7b200d0d6762dcff901a44ad5cb23993baa133d19ce18810a7b65e369`

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