PDF malware analysis — malicious · c03672987e0ee9cc

MALICIOUS

PDF

83.5 KB Created: 2021-04-02 23:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 79b8731a9708a3b59c9b9dad11c891cb SHA-1: d4e291ba55e4641dfa2313fb4008d9401cd28741 SHA-256: c03672987e0ee9ccdaf3a65944bda05542983b0bdb001ef263ada173ff2a06c6

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
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://jottigo.ru/123?utm_term=disable+safe+browsing+chrome+android PDF link annotation
- http://uber-global.com/service_auto_air_conditioningot1w6.pdfIn PDF document text
- https://dujedagopodiku.weebly.com/uploads/1/3/4/5/134580966/ziwuxesu.pdfIn PDF document text
- http://jezonikiroka.mygamesonline.org/color_blind_test_image.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456998/normal_5ff9004fd4f32.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414852/normal_5fe79a35b0897.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377663/normal_601e64ecd3050.pdfIn PDF document text
- http://opt15.ru/game_naruto_shippuden_senki_apk5d1tb.pdfIn PDF document text
- https://vomuxetajamusu.weebly.com/uploads/1/3/1/8/131857717/bikaxaw.pdfIn PDF document text
- http://f1l3download.site/how_to_become_a_navy_medical_officerg1j3b.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/0e2eb7d4-3225-4831-bbc6-13196069a8f8/seresulirugopeximefi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9167dbcc-21a5-47f6-9ede-8fc7513c7550/saduti.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/684874da-8388-41d2-8696-1a153efb9cae/the_hidden_power_of_prayer_and_fasting_free.pdfIn PDF document text
- http://zikoliduxa.atwebpages.com/warhammer_40k_audio_books_download_free.pdfIn PDF document text
- http://vivetusukuv.onlinewebshop.net/fakaxisezuf.pdfIn PDF document text
- http://jirabasojexosud.atwebpages.com/72375026327.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3f7b0fde-0b9a-4c0b-b816-b4ebf4e9d791/51363078299.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/323daa8d-33d8-4332-b7c5-368820b99b4a/jinejolunagizivimokedi.pdfIn PDF document text
- http://tiluxusimutine.atwebpages.com/51308289274.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_off0000fb39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB39	5372 bytes
SHA-256: `cf9fbbb25b918fff58a119aae64a28d387975140500c041d6af37b794fb76147`
`font_01_sfnt_off00010d4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D4C	10996 bytes
SHA-256: `cddfb67feed8784481d0225c168eb4410d3e64ef2ba443e159a776dafb0efeac`
`font_02_sfnt_off000132f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132F7	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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