PDF malware analysis — malicious · ce446687bb771c24

MALICIOUS

PDF

85.1 KB Created: 2021-09-04 00:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 71acb1576d5cea2c47509676d2923b88 SHA-1: 6cce8309fd5a6bee158dd816d1fa0af0805eba3c SHA-256: ce446687bb771c243223e2bd5cd78e203e4fd14274f393dac1c00923289c8fed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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 http://africanhairbraidingsalon.com/userfiles/file/kojaxowujekojagoxosuf.pdf In PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/6vquj1riforjvn60n5nberh5eu/lunew.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098591de03f4---14359236369.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8c8a1ec8e---87695702837.pdfIn PDF document text
- https://leo.tw/upload/ckeditor/files/gakenibam.pdfIn PDF document text
- http://capital96.com/userfiles/file/sixuvalarekomemixelikufil.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c966ed0ea32---6974158183.pdfIn PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/n3ufoh3intv2dckcc3hqn3m926/88289748161.pdfIn PDF document text
- http://bigandtallking.com/userfiles/file/66516136529.pdfIn PDF document text
- https://nwdglobal.com/ckfinder/userfiles/files/48273455059.pdfIn PDF document text
- http://bigxra.com/uploadfile/file/2021071305203073499.pdfIn PDF document text
- http://thedewakohchang.com/image/upload/File/avewinotekimofiluxiwajap.pdfIn PDF document text
- http://xn--2-140-swe8h.xn--p1ai/files/puseg.pdfIn PDF document text
- https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/0d2c475r1alt9vvq0uf87uf2ar/kojagaduf.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/hoob602safqt0vo16etaotjsq5/zopirazabigiwewotovi.pdfIn PDF document text
- http://mistral-paints.cz/userfiles/files/vizemenelamexuxud.pdfIn PDF document text
- https://solo-enoant.com/content/files/files/kusekedogoluredobotenowip.pdfIn PDF document text
- https://www.fangjin.org/ckfinder/userfiles/files/72853417537.pdfIn PDF document text
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b47c506dd---46019770200.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a779a6adda5---ronuzoguririrulemap.pdfIn PDF document text
- http://haiqi-machine.com/d/files/42285871372.pdfIn PDF document text
- http://soeurs-scjboran.fr/soeurs/upload/files/3131793702.pdfIn PDF document text
- http://abwsalisbury.com/uploads/files/61526391267.pdfIn PDF document text
- http://iccj.jp/images/uploads/fckeditor/file/nufumoret.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=tannoy+tfx+subwoofer+manualPDF link annotation
- 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e40d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE40D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fc1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC1F	18620 bytes
SHA-256: `a0606b4795a0e350f6feb361ada62d4328fc64b27e9354514f06fec4849642f4`
`font_02_sfnt_off00012c9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C9E	10788 bytes
SHA-256: `cea261a0bca0b2afea01bd5b9edc55615813be0bab543cc96e85a45c056fe9f9`

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